Definition of "Mug" :

noun: with handle and usually cylindrical

noun: the human face (kisser' and smiler' and mug' are informal terms for face' and phiz' is British)

noun: a person who is gullible and easy to take advantage of

noun: the quantity that can be held in a mug

verb: rob at gunpoint or with the threat of violence

"I was mugged in the streets of New York last night."