Home › Words › F › foulmouthfoulmouthfoulmouth means A foul-mouthed person; one who uses obscene language.EtymologyFrom foul + mouth.nounA foul-mouthed person; one who uses obscene language.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.scurrilous 67% match — Of a person, given to vulgar verbal abuse; foul-mouthed. vs foulmouth →motherfouler 64% match — motherfucker. vs foulmouth →foulsome 64% match — Characterised or marked by foulness or filth; filthy; (by extension) wretched. vs foulmouth →foulish 64% match — Somewhat foul. vs foulmouth →foully 64% match — In a foul manner; revoltingly. vs foulmouth →befouler 62% match — One who befouls. vs foulmouth →filthmonger 61% match — A purveyor of filth or obscenity. vs foulmouth →coprolaliac 61% match — Exhibiting coprolalia; using obscene words. vs foulmouth →