Definitions of mug:

• noun:   with handle and usually cylindrical
• noun:   the quantity that can be held in a mug
• 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
• verb:   rob at gunpoint or with the threat of violence

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