round upon (one)(redirected from rounding upon)
round upon (one)
To suddenly attack, berate, or show hostility toward one. (A more formal variant of "round on one.") He rounded upon the would-be assailant, knocking him to the ground and bludgeoning him with his cane. The senator rounded upon the reporter after he accused her of accepting bribes.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.