1.Knock knock. Who's there? Lettuce. Lettuce who? Let us tell you a few knock-knock jokes! 2.Knock knock. Who's there? Irish. Irish who? Irish you would hurry up! 3.Knock knock. Who's there? Dwayne. Dwayne who? Dwayne the bathtub--I'm dwowning! 4.Knock knock. Who's there? Handsome. Handsome who? Handsome of the popcorn over! 5.Knock knock. Who's there? Horsin. Horsin who? Quit horsin' around, we have work to do! 6.Knock knock. Who's there? Gorilla. Gorilla who? Gorilla me a cheese sandwich! Please? 7.Knock knock. Who's there? Ketchup. Ketchup who? Ketchup to me, and I'll tell you the answer! 8.Where did George Washington keep his armies? In his sleevies! 9.Why was Cinderella bad at soccer? She ran away from the ball. 10.Knock knock. Who's there? Fish. Fish who? I fish you would make some fish for dinner!