bastard

(noun) insulting terms of address for people who are stupid or irritating or ridiculous. Synonyms: asshole, cocksucker, dickhead, shit, mother fucker, motherfucker, prick, whoreson, son of a bitch, SOB.

(noun) the illegitimate offspring of unmarried parents. Synonyms: by-blow, love child, illegitimate child, illegitimate, whoreson.

(noun) derogatory term for a variation that is not genuine; something irregular or inferior or of dubious origin. Synonyms: mongrel. Example: "The architecture was a kind of bastard suggesting gothic but not true gothic."

(adj) fraudulent; having a misleading appearance. Synonyms: bogus, fake, phony, phoney.