chapotraphouse

In the UK it's not a gendered slur either. It's basically a more severe version of 'dickhead', but one you cannot really use in day-to-day chat depending on regional dialect. There is the class divide mentioned below, but working-class people do not use it as a whole, and it's heavily dependent on where you're from (e.g., in East London and Cockney I'd say it's more acceptable than in Essex), and, I suppose, what part of the working-class you are from not in a material sense but in a cultural sense. I have found that more ambitious/education-focused working-class people find it more tabboo than others, maybe a sort of subconscious class mimicking towards those whom they desire to be part of?

IDK though, that is just an anecdotal observation without much supporting evidence.

But in British English I do not think it has the gendered connotations of b----, for instance. Not at all. While b- is most commonly, albeit not universally, used for women (by both women and men), c--- has no gender boundaries with regards to the recipient and has lost all contact with the origins of the word (of course, nobody is using it as a synonym for "vagina" these days, at least, if so it is very rare and seen universally as crass and gross).