Umm. Well, yes, that's it in English, but it isn't precisely that in French; we've lost the literal meaning in translation. Cul is a medical term, also part of a ribald exercise for French pronunciation*. Tain't a fit word for a G-rated Board like this one. ;-)

*("Tu pus du cul nu," if you must know. I'm not sure it's used that much any more.)