knock someone's block off

Beat up someone, as in If he doesn't leave at once, I'll knock his block off. This hyperbolic term employs block in the sense of “head,” a usage dating from the 1600s. The idiom, however, dates only from about 1900. Also see beat the living daylights out of.

Words nearby knock someone's block off

knock oneself out, knock out, knock over, knock over with a feather, knock rummy, knock someone's block off, knock someone's socks off, knock the bottom out of, knock the living daylights out of, knock the socks off, knock together