the.com/shrug

means To lift and drop your shoulders briefly as a way of signaling indifference, ignorance, or 'why ask me,' usually instead of actual words.

from Of murky origin — it surfaces in English in the late Middle Ages as 'shrugge,' and nobody is fully certain where it came from. It may be related to words in Scandinavian languages describing shrinking or huddling the shoulders, as if the body were trying to make itself smaller to avoid commitment. Fittingly, even the etymology shrugs: the honest answer is 'unclear,' which the word seems almost proud of.