During intercourse, oral sex, or mutual masturbation, the male ,upon reaching his climax, proceeds to ejaculate upon the torso of his partner. At this point the male tosses a handful of confetti all over his partner and yells "Surprise!"

One who has a mania for music.

Occurs when an unexpected guest knocks on your bedroom door when you are masturbating and about to orgasm, and you open the door and ejaculate on them, shouting "Surprise Party!" Common in college dormitories.

When a lot of people you don't know show up at your house because they heard you were having a party.

MUST BE DONE WITH LIGHTS OFF! When a male pretends to have penetrated a female's vagina with his penis but in fact has inserted a life-like dildo (works best from behind). He proceeds to fake intercourse for a period of time, using the dildo all the while, and suddenly, falls off the bed with yell while leaving the dildo deep in the vagina. The male then turns back on the lights and yells surprise!

When you have friends over for another person birthday and you shout “SUPRISE” the whip out your cock and jizz over all the food

When you and your friend arrive at your house, you run well ahead of them and slam the door shut. Once inside, quickly attach yourself to the doorknob “butt plug style”. When the knob turns inside your anus and your friend pushes on the door…SURPRISE!!!