noun: The fear of masturbation, or the sound of it.
*fap fap fap fap*
Person A: AAAAARGH!! Stop it!
Person B: What?
Person A: That sound! Stop fapping! It's killing me! IF I DIE FROM THIS I WILL HAUNT YOUUUUU
Person B: ...Yeah, dying from me masturbating. Pfft. *fap fap fap* You have fapfaphobia.
Person A: Arghhhh! STOP IT!