from
The Collaborative International Dictionary of English v.0.48
Shrug \Shrug\ (shr[u^]g), v. t. [imp. & p. p. {Shrugged}
(shr[u^]gd); p. pr. & vb. n. {Shrugging} (shr[u^]g"g[i^]ng).]
[Probably akin to shrink, p. p. shrunk; cf. Dan. skrugge,
skrukke, to stoop, dial. Sw. skrukka, skruga, to crouch.]
To draw up or contract (the shoulders), especially by way of
expressing doubt, indifference, dislike, dread, or the like.
[1913 Webster]
He shrugs his shoulders when you talk of securities.
--Addison.
[1913 Webster]