mug

1 mug /ˈmʌg/ noun
plural mugs
1 mug
/ˈmʌg/
noun
plural mugs
Britannica Dictionary definition of MUG
[count]
1 
a  : a large drinking cup with a handle
b  : the liquid that is contained in a mug
2 
3 
British, informal : a foolish person who is easily tricked : patsy
2 mug /ˈmʌg/ verb
mugs; mugged; mugging
2 mug
/ˈmʌg/
verb
mugs; mugged; mugging
Britannica Dictionary definition of MUG
1 
[+ object] : to attack and rob (someone)
2 
[no object] chiefly US : to act or pose in a silly way or make silly facial expressions especially to attract attention or when being photographed — usually + for

mug up

[phrasal verb]
mug up or mug (something) up or mug up (something) or mug up on (something) British, informal
: to study or try to learn a lot of information quickly for a test, exam, etc.