What you put on when it's time to get shit done.
When you've played around for a while (usually on a video game) and done well so far, but have decided to play to your max potential when things get rough. Commonly used by both Halo and CS fans.
Halo: Alright Shee fag, you've had your fun, it's time to put on the try hard pants. (gets in a hornet)
CS: Alright Awp Whore, you've had your kill streak, now it's time to put on the try hard pants. (whips out the Famas on burst)
One who slaps "bitches" with oven mits; the act of slapping a"bitch" with an oven mit (a noun labeling men specifically a verb carried out by men toward women)
David was known as a handpantsa to all his old girlfriends; He hand-pantsa-ed the shit out of Angela