If you shrug, you raise your shoulders to show that you are not interested in something or that you do not know or care about something. I shrugged, as if to say, `Why not?' The man shrugged his shoulders. Shrug is also a noun. `I suppose so,' said Anna with a shrug. to raise and then lower your shoulders in order to show that you do not know something or do not care about something. 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
{i} instance of raising and lowering the shoulders to express indifference or uncertainty