A large cup for hot liquids, usually having a handle and used without a saucer.
The face, often used deprecatingly. Example: What an ugly mug.
A gullible or easily-cheated person. Example: He's a gullible mug – he believed her again.
A stupid or contemptible person.
To strike in the face.
To assault for the purpose of robbery.
To exaggerate a facial expression for communicative emphasis; to make a face, to pose, as for photographs or in a performance, in an exaggerated or affected manner. Example: The children weren't interested in sitting still for a serious photo; they mugged for the camera.
To photograph for identification; to take a mug shot.
To learn or review a subject as much as possible in a short time; cram.
Easily fooled, gullible.
All clues having "MUG"
for an answer:
You can find a list of possible crossword clues for MUG below.