Abbreviation of perfluorooctanesulfonamide.

(archaic) Yule log (large log traditionally burned on Christmas Eve)

So hot as to seem to burn (something). / Feeling very hot. / Feeling great passion. / Consuming; intense; inflaming; exciting; vehement; powerful. / Being keenly discussed. / On fire.

(informal) The characteristic of regularly using vulgar language, especially strong profanities; a person having this characteristic.