The chances are you're a comedy fan, and you already know these terms. But just to make sure, here are some terms that are likely to come up during the course and what they mean when used by stand-ups.
act
a comedian's signature or usual performance
acts
the performers on a bill
bill
the line up of comedians on a show
bit
a section of a routine
bomb
do badly
callback
a joke that refers back to a previously-told joke
character comedian
stand-up that performs using a different persona / clothing to their own
clean
a performance that contains no profanities or references to vulgarities
die
do badly
gag