Dictionary definition · mug
noun
- the quantity that can be held in a mug
- a person who is gullible and easy to take advantage of
- the human face (‘kisser’ and ‘smiler’ and ‘mug’ are informal terms for ‘face’ and ‘phiz’ is British)
- with handle and usually cylindrical
verb
- rob at gunpoint or with the threat of violence"I was mugged in the streets of New York last night"
- To stare awkwardly
Source: Open English WordNet (CC BY 4.0).