trounce, defeat utterly, beat, annihilate, drub, give a drubbing to, crush, rout, worst, overwhelm, outclass

informal hammer, clobber, thrash, lick, best, paste, pound, pulverize, crucify, slaughter, massacre, murder, flatten, demolish, destroy, walk over, wipe the floor with, take to the cleaners, make mincemeat of, turn inside out

British informal stuff, marmalize

North American informal shellac, cream, skunk, blow out

US informal own