gag
noun
a humorous anecdote or remark intended to provoke laughter
“he told a very funny joke”
“he knows a million gags”
restraint put into a person's mouth to prevent speaking or shouting
Synonymsmuzzle
verb
prevent from speaking out
“The press was gagged”
Synonymsmuzzlebe too tight; rub or press
“This neckband is choking the cat”
tie a gag around someone's mouth in order to silence them
“The burglars gagged the home owner and tied him to a chair”
Synonymsmuzzlemake jokes or quips
“The students were gagging during dinner”
Synonymsquipstruggle for breath; have insufficient oxygen intake
“he swallowed a fishbone and gagged”
cause to retch or choke
Synonymschokemake an unsuccessful effort to vomit; strain to vomit
Source: WordNet 3.1, Princeton University