To beat; to demolish.
1834. As sure as you saw the fire at the muzzle of his gun, so sure he knocked the creters hind sights out.Caruthers, The Kentuckian in New-York, i. 21 (N.Y.).
1851. Youd er thought hed er knocked the nigh sites offn every mothers son of em!Polly Peablossoms Wedding, &c., p. 52.
1853. It goes agin my grit for Hardscrabble to cave in to Dogtown, when we could knock the hindsights off em, if we was only a mind to.Durivage, Life Scenes, p. 43.