a large cup, typically cylindrical with a handle and used without a saucer

she picked up her coffee mug

a person's face

I don't want to see Barry's ugly mug when I get home

a stupid or gullible person

they were no mugs where finance was concerned

a violent criminal or troublemaker

attack and rob (someone) in a public place

he was mugged by three men who stole his bike

make faces, especially silly or exaggerated ones, before an audience or a camera

he mugged for the camera

learn or revise a subject as far as possible in a short time

I'm constantly having to mug up things ahead of teaching them

we had mugged up on all things Venetian before the start of the course