whoop ass

Etymology
From English (variant of ) +.

Verb

 * 1)  To beat or strike.
 * 2)  To defeat in a fight.
 * 3)  To defeat or excel against (someone) in a competitive event.
 * 1)  To defeat or excel against (someone) in a competitive event.
 * 1)  To defeat or excel against (someone) in a competitive event.

Usage notes
This can be used both transitively (whoop someone's ass) or intransitively (whoop ass on someone).