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
Cromer paid those guys to attack Tiffany, so after he saved her, she would let him herogasm on her face.
by Crommer the gap toothed pirate March 9, 2019