Going home with a casual sex buddy only to find that she/he is not the gender you had once believed.

The act of making love to an asian woman from behind in the rectum, and as the woman turns around you realize she has a penis. 85% of the time a donkey punch will result.

a transvestite or hermaphrodite that you didnt know was not either of the 2

to shit in a friend or foe's toilet without flushing. Leaving it to be found by the next unlucky soul. Prefereably at the point once discovered, the poo will have deteriorated into a cloudy substance which upon departiculation after initial flushing will release maximum odor.

To ejaculate on the back of someone while they are asleep or passed out.

During Sexual intercourse from behind, the penis is withdrawn, the male spits on his partners back, and begins to vigourously masterbate, and when his partner turns around, he ejaculates in her face.

Come on. Everyone knows that a Shanghai Surprise is when you take a shit in someone's toilet and instead of flushing, you just put the cover down. When the next person lift the cover to use the toilet, there is a nice shit waiting for them.