When you are porking and you start to feel something strange in your neighborhood down below, so you then push out a nut inside her without her ever knowing.

when you're hungover as shit after a spending a night drunk as a skunk

When you ejaculate on someone's face and throw flour on it right after.

to have a so much fun it feels like an orgasm.

When you get jerked off by someone but you don't know who it is.

You must ejaculate in order for the ghostbust to be completed.

A ghostbust can only be done by boys on boys and it is of utmost importance that one doesn't know he identity of the ghostbuster during the act.