gag

Short definition from Wiktionary

Noun

1. 1
   A device to restrain speech, such as a rag in the mouth secured with tape or a rubber ball threaded onto a cord or strap.
2. 2
   An order or rule forbidding discussion of a case or subject.
3. 3
   Any suppression of freedom of speech.
4. 4
   A joke or other mischievous prank.
5. 5
   a device or trick used to create a practical effect; a gimmick
6. 6
   A convulsion of the upper digestive tract.
7. 7
   A mouthful that makes one retch or choke.
8. 8
   Unscripted lines introduced by an actor into his part.
9. 9
   Mycteroperca microlepis, a species of grouper.
10. 10
    Abbreviation of group-specific antigen.
11. 11
    Initialism of glycosaminoglycan.

Verb

1. 1
   To experience the vomiting reflex.
2. 2
   To cause to heave with nausea.
3. 3
   To restrain someone's speech by blocking his or her mouth.
4. 4
   To pry or hold open by means of a gag.
5. 5
   To restrain someone's speech without using physical means.
6. 6
   To choke; to retch.
7. 7
   To deceive (someone); to con.
8. 8
   To astonish (someone); to leave speechless.