wipe the floor with someone

verb2

1. •
   (slang) To be well ahead of someone, or to win a competition by a considerable margin over someone.

   • The young newcomer is wiping the floor with the more experienced players.
2. •
   (slang) To comprehensively beat someone in a fight.

   • "Courage? Blast it all, lad, if I were twenty years younger I'd wipe the floor with you now." — 1936