bit

a string of jokes/ gags usually all focused on the same general topic of conversation
usually sums up all gags made recently into one bit

i pulled off a great bit the other day, i had kelbin convinced he was adopted

gag

making a joke or remark that is funny

poking fun at what someone looks like
creating a funny scenario in which to humiliate someone playfully

im about to pull a gag on this gaggle of girls, watch