When playing a video or music on a computer, ipod, or other mp3 device. The audio was unexpectedly turned all the ways up, and blasts your eardrums out. Sometimes causing you to make the face of an orgasm.

When you are about to nut, but you dont tell her that you are...then nut all over her face unexpectedly.

Usually coined in for being a sarcastic say when something you expected to happen, happens.

When you take a shit and when your little buddy (extremely large fat man sheeite) responds with a nice thtoink right to the ring piece (asshole)

When a person with a penis, in a sneaky manor, gets on on all fours like a dog, and tucks their penis and tesiticles between their legs. They then simultaneously shake it like a tail and howl at the moon, surprising an unexpecting bystander.

When you are of a different race or color in a foreign country and an African-American proceeds to call you a Nigga
You have taken part in a process called "Unexpected Niggary"

Encountering a surprise during anal sex, which causes the flight to become bumpy or possibly even necessitates an emergency landing...