I'm gonna plant my foot, up your ass!

A term that when heard should inspire a sense of OH F**K... I'M ABOUT TO DIE :), it is NOT a sexual term, and essentially means the same as "I will kick your ass, and not in a good way", if delivered with proper intimidation can immediately shut down a bad situation.

person 1: (is stuck in an enclosed space)

person two: should i help him, Person C?

person c: methinks he deserves to be stuck

person 1: If you don't help me, I'm gonna plant my foot, up your ass!