Definitions by Dontbeadick

STFD

Sit the Fuck Down

Used when someone just says something obnoxious and you need to put them in their place

Keenan: Aww man, my parents aren't getting me a Mustang for my 16th birthday. This is so unfair.

Damien: Dude, STFD. stop being a douche.

STFD by Dontbeadick October 3, 2011