kick (someone's) ass

mainly American, very informal!

to punish someone or to defeat someone with a lot of force.

The General saw the conflict as a chance for the Marines to go in and kick ass.

We want to go into the game and kick some ass.

• on blocks
• on board
• on borrowed time
• on call
• on case
• once again
• once and for all
• Once bitten, twice shy.
• once in a blue moon
• once-in-a-lifetime
• once in a lifetime
• once in a while
• once upon a time
• on cloud nine
• on coat-tails
• on course
• on cue
• on dangerous ground
• on deck
• on demand
• on doorstep
• on duty
• one after the other
• one and all
• one and the same