What is the meaning of mug?

noun

• The quantity that can be held in a mug.
  • synonyms: mugful
• A person who is gullible and easy to take advantage of.
  • synonyms: chump, fool, gull, mark, patsy, fall guy, sucker, soft touch
• The human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British.
  • synonyms: countenance, physiognomy, phiz, visage, kisser, smiler
• With handle and usually cylindrical.

verb

• Rob at gunpoint or with the threat of violence.
  • usage: "I was mugged in the streets of New York last night"