1. Literally, to make a gesture by raising and dropping one's shoulders, often meaning that one does not know something or is indifferent to something. Don't just shrug your shoulders—I want an answer! I asked the kids if they wanted pizza for dinner and they just shrugged their shoulders. I thought they would be excited about it.

2. To feel or display indifference, indecision, or an inability to do something. Too many people simply shrug their shoulders when it comes to getting enough exercise. If they encounter something they can't resolve, management just shrugs their shoulders and ignores it.