That one in a million moment when you have an anal spasm and an orgasm at the same time. An anal spasm doesn't need to de induced by anal sex, it is more usual for it to come on after an especially energetic shit. Both of these are independent events that can happen in every day life but when combined turn into something beautiful, threading the boundary between pain and pleasure like a surfer riding a monster wave.

A polite term for shoving a lubricated probe into the Earth's hole to release gas.