The state of matter in which you are called up to the board in class with an erection. In a last ditch effort to deflect that which is erect you offer a means of distraction, such as a brick through a window or a pair of inflatable fake boobs.
When something or someone causes you to lose your pleasure or ruins your enjoyment. Going from happy or laughing to immediately sad or depressed.
The teacher's homework was a total erection deflection. Taylor has been a real erection deflection lately. Enos, why are you such an erection deflection? Oh man your girlfriend is cheating on you, what an erection deflection.
When meeting a person online or in a video game posing as a female to get money or items, and later turns out to be a man.
John: Man, I met this girl on WoW the other night. We sexted for hours.
Rick: You mean Superhotty6969? Yeah, pretty sure that's a dude.
John: No way, I think my junk would know if it was a dude.
Rick: Sounds like erection deception to me.