gag
     n 1: a humorous anecdote or remark intended to provoke laughter;
          "he told a very funny joke"; "he knows a million gags";
          "thanks for the laugh"; "he laughed unpleasantly at
          hisown jest"; "even a schoolboy's jape is supposed to
          have some ascertainable point" [syn: {joke}, {laugh}, {jest},
           {jape}]
     2: restraint put into a person's mouth to prevent speaking or
        shouting [syn: {muzzle}]
     v 1: prevent from speaking out; "The press was gagged" [syn: {muzzle}]
     2: be too tight; rub or press; "This neckband is choking the
        cat" [syn: {choke}, {fret}]
     3: tie a gag around someone's mouth in order to silence them;
        "The burglars gagged the home owner and tied him to a
        chair" [syn: {muzzle}]
     4: make jokes or quips; "The students were gagging during
        dinner" [syn: {quip}]
     5: struggle for breath; have insufficient oxygen intake; "he
        swallowed a fishbone and gagged" [syn: {choke}, {strangle},
         {suffocate}]
     6: cause to retch or choke [syn: {choke}]
     7: make an unsuccessful effort to vomit; strain to vomit [syn:
        {heave}, {retch}]
     [also: {gagging}, {gagged}]
Source: WordNet® 2.0

gag vi. Equivalent to {choke}, but connotes more disgust. "Hey, this is
   FORTRAN code. No wonder the C compiler gagged." See also {barf}.


Source: The Jargon File