I. shrug 1 W3 /ʃrʌɡ/ BrE AmE verb ( past tense and past participle shrugged , present participle shrugging ) [intransitive and transitive]
to raise and then lower your shoulders in order to show that you do not know something or do not care about something:
I just shrugged my shoulders and ignored him.
Melanie shrugged and walked away.
shrug something ↔ off phrasal verb
to treat something as unimportant and not worry about it:
We can’t just shrug these objections off.
II. shrug 2 BrE AmE noun [countable]
1 . [usually singular] a movement of your shoulders upwards and then downwards again that you make to show that you do not know something or do not care about something
with a shrug
‘Suit yourself,’ he said with a shrug.
2 . a very short ↑ cardigan