Harden The Fuck Up
Used to tell a weak person or persons that they have become far too weak, and to prevent further embarrasment to the human race, they must Harden The Fuck Up.
1. I see that you are on the side of the road with a flat tire. What, you, a fully grown man can't change a tire yourself, and you're waiting for a tow truck? HTFU!
2. "This is Michael. He can't go on a family holiday without bringing his portable gaming console. HTFU, Michael!"