when you have sex with, a person that studders, or a person has sex with you, and you have a studder.
You :" Dude, i totally had sex with that chick who studders!"
OtherGuy: "oh man, you had your first studderfuck!"
OtherGuy: "oh man, you had your first studderfuck!"
by xamplesample July 11, 2008