when a guy is so drunk his fucking performance is sloppy, and he can't perform. Even worse - he doesn't realize it!
girl - 'fuck me babe, fuck me!'
guy - 'Come on babe; it's a marathon, not a race'
girl - that guy last night had such a such a sloppy dick
By Annamarie
Sloppy Donut Dick
As originally said by Theo Stockman (aka The King of Fuck of American Idiot). Used to describe a penis that has attempted to have sexual intercourse with a dount.