1) when a guy is totally ready to bone the chick he brought home from the bar that night (or to her place), but just can't seem to get it up, no matter how hard he tries (or she tries);
2) in
immediate need of some viagra;
3) the
awkward moment where he looks at you and says, "It's
not gonna happen..."
(the day after) - Chick 1: "...and we left the bar after he was talkin' all
that shit, and he ain't shit!"
Chick 2: "So you're saying he couldn't even get it up?"
Chick 1: "Ya, it was a dicksaster."
(dude
talking with other dudes) - Dude 1: "This has never
happened to me before, man."
Dude 2: "Yeah, sure it hasn't. Sounds like another dicksaster to me."