shrug
n. countablen. a movement where you raise your shoulders to show you do not know something or do not care. It is a quick way to say 'I have no idea' without speaking.
n. a gesture involving the brief elevation of both shoulders, typically used to express indifference, ignorance, or uncertainty.
He gave a quick shrug when I asked for the time.
When asked about the missing keys, she responded with a silent shrug of her shoulders.
The politician met the reporter's difficult question with a dismissive shrug, suggesting that the matter was beneath his concern or simply not worth the effort of a verbal rebuttal.
From Middle English schruggen, shrukken, probably of North Germanic origin related to Danish skrugge, skrukke (“to stoop; crouch”), Swedish skruga, skrukka (“to huddle; crouch”), all from or related to Old Norse skrykkva, from Proto-Germanic *skrinkwaną. Compare also Old English scrincan (“to shrink”). More at shrink.
Often used with the verb 'give' or 'offer'; frequently appears in the phrase 'a shrug of the shoulders'.