wipe the floor up with someone
wipe the floor up with (one)
1. To easily and thoroughly defeat one in a competition or contest. Primarily heard in US. Although he wasn't favored to win the race, Jack really wiped the floor up with the competition. Everyone was impressed the underdog team made it to the finals, but the returning champions wiped the floor up with them.
2. To physically beat or thrash one to the point of serious injury or incapacitation. Primarily heard in US. Tom got into a fight with some dude at the bar, but the other guy wiped the floor up with him.