[2] Common four-letter words (in this context) widely considered vulgar or offensive include: cunt, fuck (and regional variants like feck, fick, fock, and foak), jism (or gism), jizz, shit, slut, twat, and tits.
Some of these words have been deemed legally indecent under the regulations of the United States Federal Communications Commission (FCC) for TV and radio open-airwave broadcasting.
Additionally, slurs related to racism, ableism, and an individual's sexual orientation may qualify, such as mong (in the UK not a racial slur,[citation needed] but short for Mongol, or someone with Down syndrome – previously called Mongolism), gook, kike, spic, coon, dago, and dyke.
A borderline category includes words that are euphemistic evasions of "stronger" words and those that happen to be short, with both an expletive sound to some listeners and a sexual or excretory meaning (many also have other, non-vulgar meanings): butt (US), crud, darn, dump, heck, poop (US), slag (UK, NZ, AUS), slut, and turd.
Finally, some four-letter terms with limited usage can be considered offensive within the regional dialect they are used, such as mong and mary.