Uncle!

Uncle!

An exclamation of defeat and/or a plea for mercy, especially in an informal physical contest of some kind. Uncle! Uncle! Let me out of this headlock already!

Uncle

verb
References in classic literature ?
But bless your hearts and eyebrows, all this sort of thing was nothing to my uncle
During a time of doubt, despair and sickness, a little girl with a performer's smile skipped up to me exuberantly and shrilled, 'Hello Uncle