|Origin:||Probably from a Scandinavian language|
mug1 S3 [countable]
a tall cup used for drinking tea, coffee etc:
a coffee mug
a large glass with a handle, used especially for drinking beer:
a beer mug
a mug and the liquid inside it:
Two mugs of tea, please.
4 British English spoken informal
someone who is stupid and easy to deceive:
Only a mug would pay that much for a meal.
5 British English spoken
to be something that only stupid people do because it is not likely to be successful or to bring you money:
Gambling is a mug's game.
6 spoken informal
Something scared him. Probably your ugly mug!