Jan-Ken: Actually the Japanese name for "scissors/paper/stone." Goku punches (stone) and the proper counter is a block (paper.) Scissors is a poke in the eyes.
Kamehame-Ha: A power blast. Originally, The Turtle Hermit* was the only one that could do this, after 50 years of training. Goku picked it up just by watching. Jackie Chun is the third person to have been seen using this attack. Later on, a number of other characters start using it. (For those who missed it: Jackie Chun is actually Kamesennin in disguise, for those times when he wants to fight in the Budoukai. Further, Kamehameha is the name of a very famous Hawaiian King.)* (Kame means "turtle".)
Zanzou-Ken: "Persistant Image Technique". A fake, where the attacker moves so fast that an after-image is left behind. Goku has been able to leave multiple images of himself. First used by Jackie Chun.
Dodon-Pa: This is actually a mimetic adjective used to describe something that is very powerful (eg. — That bull is dodon strong.) This is the name Tao Pai Pai uses for his finger-blast, which initally is more powerful than Goku's Kamehame-Ha. Dodon can also be used as a sound effect for an explosion (kind of like calling your bomb a "ka-whump".) Rouga Fuufuu Ken: Yamcha's "Wolf Wind Attack." In volume 10, this is replaced by Shin-Rouga Fuufuu Ken, or "New" Wolf Wind Attack.
Shiyou-Ken: "Four Arms Technique." This allows Tenshinhan to grow an extra pair of arms from his back. First and last used at the 22nd Budoukai.
Haikyou-Ken: Tenshinhan's "Volleyball" attack. Basically, Goku is tossed into the air, received, and then spiked into the ground.
Shin-Tsurusen-ryuu Taiyou-Ken: This is a blinding attack first used by Tenshinhan during the 22nd Tenkaichi-Budoukai. His entire body can glow with a very intense light. Translates to "New Crane School Sun Fist," or "Sun Technique." The FUNimation version calls it the "Solar Flare."
Kikou-Hou: "Energy cannon/bomb/shot." Another of Tenshinhan's techniques. Requires a lot of concentration, and can be very devastating. However, continued use of it can kill the caster, as it uses up a lot of the person's energy each time. Even one use is said to shorten the life of the user.
Chounouryoku: ESP, telekinesis, telepathy, and the like. Chaozu can cause people to freeze in place, levitate, etc. If he freezes someone long enough, either their heart will stop, or they'll suffocate.
Makousen: "Magic (Demon) Light Beam." Piccolo Daimaou's answer to the Kamehame-ha.
Mafuu-Ba: "Demon Sealing Wave." The Turtle Hermit tries to use this spell to re-capture Piccolo Daimaou. If you have a container (like a rice cooker), you can use the Mafuu-Ba to force Piccolo into it, and keep him there. The trade off is that regardless of whether you succeed, the spell requires a tremendous amount of Ki, and will likely kill its caster. Kami-sama tries to use it on Ma Jr., but Ma Jr. uses a Mafuu-Ba-Gaeshi ("-rebound") technique, and Kami-sama is captured, instead. Mafuu-Ba was originally used by Kamesennin's teacher, Mutaito, to seal up Piccolo Daimaou in the distant past. Sou Ki Dan "R/C Ki Shot." Yamucha's remote-controlled energy ball. FUNimation's version calls this a "Spirit Ball." Super Dodon-Pa A souped-up cannon blast that cyborg Tao Pai Pai uses against Tenshinhan. Much stronger than the regular Dodon attack.
Shishin no Ken: "Four Body Technique." Tenshinhan has the ability to create 3 exact clones of himself (actual creations, not just images.) First used during the 23rd Tenkaichi-Budoukai. Chou-Kamehame-Ha "Super" Kamehame-Ha. Goku uses it for the first time while facing Ma Junior during the 23rd Tenkaichi-Budoukai.
Bukuujutsu: "Dancing on Air." This is name of the technique used when people levitate or fly around.
Makankousappou: "Demonic piercing light killing shot." Piccolo's screw blast. Very powerful, but requires some time to build up the energy, first. FUNimation refers to this technique as "Special Beam Cannon."
Kaiou-Ken: Kaiou-sama teaches Gokuu a technique that can raise his power, speed, and other battle attributes, while cutting his endurance by the same factor. There are a series of Kaiou-Ken levels, each lineraly more powerful than the last. There is unconfirmable speculation that Tenshinhan and Chaozu also learned the Kaiou-Ken during their visit to the Kaiousei.
Genki Dama: "Life Force Sphere." A technique whereby the user siphons off energy from the living things on the planet around him and uses it to attack with. The more energy available, and the longer the caster chooses to gather it, the bigger the sphere. According to Kuririn, this can only be performed in normal mode — Super Saiya-jin can't create a Genki Dama, but they can use the energy from it if it already has been formed. It's not so much an energy attack, as it is a matter of throwing a small star at someone. In the final battle against Majin Buu, Gokuu receives the life energy of people from distant solar systems, over the course of several minutes. In this case, the people have to raise one arm, and voluntarily give the energy to him.
Ki En Zan: Kuririn's "slashing energy disc", developed to combat Nappa and Vejiita. Identical or similar techniques are also used by Vejiita, Freeza, Cell, and Gokuu. Rikuum Eraser Gun: The name for Rikuum's mouth blast, more powerful than most hand-projected blasts.
Crusher Ball: Jiisu's super powerful energy sphere.
Daichi Retsuzan: Freeza's Earth Cutter. A slashing energy attack.
Body Change: Ginyuu's ability to switch bodies with anyone he is in a direct line-of-sight with.
Shunkan Idou: "Instantaneous relocation." The teleport ability that Gokuu learns on Yardrat. The catch is, he can only jump to a place where someone he knows is located (he has to feel that person's Ki to teleport to that place.)
Enerugii Kyuushuu: "Energy absorption." No. 19 and No. 20's Energy Sucking ability. Both androids have receptors in their hands that allow them to drain the power from humans.
Hell's Flash: No. 16's energy blast attack, fired from his forearms.
Shin*-Kikou-Hou: Tenshinhan's improved version of the Kikou-Hou. It's argued that the new version is not as suicidal as the old version. Others say that Tenshinhan has gained more control over how to use his power (when he uses this against Cell as a delaying tactic, it still drains him pretty completely.) * ("new")
Jibaku: "Self-destruct." Cell's self-destructing world killing blast. Cell bloats up, explodes, and wipes out the planet. Dr. Gero was certain to include Jibaku devices in all his androids, in an attempt to keep them under his control. No. 16 is seen trying to perform Jibaku in his attack against Cell. Chaozu performs Jibaku against Nappa. Seru Junia Umi Dashi "Spawning Cell Jrs." Cell not only uses his stinger tail to consume people — he can spit out small, mindless, vicious versions of himself.
Papparapa: The magic word Babidi uses to casts spells. It is kind of the Japanese version of "Presto!"
Seki-ka Tsuba: "Turn-to-stone spit." Darbura's ability to turn people into statues by spitting on them. This is a form of magic that is dispelled when Darbura dies.
_ ni Natchae!" "Turn into ___.": Not really the name of a technique, these are just the words Buu says when he uses his magic to turn people into food, which he then eats. He uses this technique to turn Darbura into a cookie, and Chi Chi into an egg (which he steps on).
KameKame-ha: Goten's version of Kamehame-ha.
Fusion: A process that allows two people to become one. It's not a permanent condition, lasting only thirty minutes. It requires that the two participants be of near-equal power and size, and that they both have a certain amount of prepping. Includes having to go through a stupid-looking set of dance steps. Gokuu learned it while he was training in the after-life. He teaches it to Piccolo, Goten and Trunks.
Super Saiya-jin 1: The new name for what has always been called "Super Saiya-jin," to clarify it from further stages.
Super Saiya-jin 2: A stage higher than the standard Super Saiya-jin stage, first attained by Gohan during tha battle against Cell.
Super Saiya-jin 3: Gokuu's name for "beyond the beyond the Super Saiya-jin." By powering up well past the "Saiya-jin level," Gokuu's face becomes leaner, his hair grows down to his waist and he gets very strong. But, it's still not enough to defeat Buu when tried against him.