
Questions
In Tae Kwon Do 1st, 2nd, and 3rd Dan instructors are classed as "Bo Sabum nim" 4th, 5th, and 6th Dan International instructors are classed as "Sabum nim" Another source says: "Sa-beum-nim: Tae Kwon Do; is a title given to a teacher, equivalent to 'Master'"
"Sabum" is a shortened version of this term for instructor. This nickname/title has remained with him since those early days.