SITFU, short for Suck It The Fuck Up. Commonly used by
men towards
whining women or other
men that are whining. Used by military members towards other military members that are whining.
The Sgt told the
Gunny that his head hurts from his old
lady beating him with a baseball bat. The Gunny tells him to go to medical, and get some SITFU to make it
better. The Sgt asks, "what's SITFU"? The Gunny says, "SUCK IT THE FUCK UP"!!!!!