It means that if he's right you would have to put "Enscheff has a 10" donkey Dickey, ****ed my wife, kicked my ass at catch, and makes 10X as much as me" in your signature. If he's wrong, he would have to put "I desperately seek validation, have a micropenis, live in my Mother's basement, and love realtors" in his.
Make the deal Guv. Make the deal.
Correct. Except I'll make his signature be, "This poster has a Baseball Knowledge Index of X/10", and I get to decide what X is.
State what mine will be, and let's seal this deal.