IDIOMS

beat the stuffing out of

(idiomatic) To trounce, outdo, or triumph over.

Example:   If you ever use that kind of language in front of my girlfriend again, I am going to beat the stuffing out of you.
  At the fiesta, the kids beat the stuffing out of the pinata, and their parents beat the stuffing out of a drunk who walked up and made threats.
  The U.S. ski team beat the stuffing out of the Austrians in Alpine, but Norway took the gold home in Nordic.