1 definition by Lil Tricksta
The euphoric feeling after getting 100% on a song on Guitar Hero. Identifiable by high pitched screaming, jumping, and the need to show others one's achievement.
Guy: Whats that noise coming from your bro's room?
Girl: Oh he's playing Guitar Hero. He must be having a herogasm.
Girl: Oh he's playing Guitar Hero. He must be having a herogasm.
by Lil Tricksta January 30, 2009