a shoulder motion meant to express indifference, want of an answer, etc., 1590s, from shrug (v.).
shrug (v.)
c. 1400, schurgyng, of uncertain origin. Perhaps connected to Danish skrugge "to stoop, crouch." Related: Shrugged; shrugging. To shrug (something) off "dismiss" is recorded from 1909.
实用例句
1. He gave a feeble shrug and tried to squirm free.