Beat The Daylights Out Of Meaning

(transitive, idiomatic) To defeat (someone) thoroughly and decisively, especially in a physical fight.

Example: 1993, Lester Sumrall, The Life Story of Lester Sumrall, ISBN 9781614581192:
  Punching fast and furiously, I would beat the daylights out of them until they were bloody all over.
2007, Greg Oliver, The Pro Wrestling Hall of Fame: The Heels, ISBN 9781554902842, page 42:
  The guy beat the daylights out of me, and I made a dollar. My wrestling license cost five dollars.