To put someone, or
something, to complete
shame, or humiliation, and to
better it in every capacity; to utterly outdo, outperform or outwit. The phrase is used to conjure sentiments of shaming to the point of using that thing for the lowly task of mopping the floor with. Generally used in past, or more rarely, future or prospective tense.
1. Peyton Manning just mopped the floor with Tom Brady.
2. That
kid just mopped the floor of that Pogs tournament!
3.
Gandalf would totally mop the floor with
Harry Potter.