Do you say chumbi when you bow in Tae Kwon Do?

Answer 1

Chumbi is not an accurate spelliing of a Korean term for Taekwondo, and probably is being mispronounced.

준비 Junbi (pronounced "June-Be") means "ready"

경례 Gyeongrye (pronounced "Gyuhng-ryay") or Gyeongnye ("Gyuhng-nyay")

means to bow as a formal greeting or salutation - - to salute.

In Taekwondo, the instructor says the command of "Charyeot" (attention), and "Gyeongnye" (bow). The students either bow silently, or respond with whatever verbal expression the instructor prefers, such as "gamsahamnida" (thank you), or "Taekwon!" or some other such reply.