When you're hittin' it from behind, and the gal is in the midst of an orgasm and releases an epic fart...So epic, infact, that you have to pull out and back off that badunkadunk for at least a minute. This is usually resolved by delivering the 'intentional' accidental dolphin.
Dude, I was hittin' it, she was about to bust, and I gotdogg-fogged.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).