mug

A mug is a large cup for hot drinks, with a handle but not used with a saucer.

Example: He drank his hot coffee from an old mug.

A mug can also be a person's face.

Example: He had an ugly mug.

A person who can be tricked easily can be called a mug.

Example: The teacher was a mug – he believed my excuse.

To mug someone is to rob them, to steal from them.

Example: He hid in a doorway and planned to mug the next person who walked past.