Pronunciation: (mug), [key]
—n., v., mugged, mug•ging.
1. a drinking cup, usually cylindrical in shape, having a handle, and often of a heavy substance, as earthenware.
2. the quantity it holds.
a. the face.
b. the mouth.
c. an exaggerated facial expression; grimace, as in acting.
d. a thug, ruffian, or other criminal.
4. Brit. Slang.a gullible person; dupe; fool.
1. to assault or menace, esp. with the intention of robbery.
2. Slang.to photograph (a person), esp. in compliance with an official or legal requirement.
Slang.to grimace; exaggerate a facial expression, as in acting.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.