guttermouth

Noun

informal

(informal) A foul-mouthed person. / (informal) The obscene manner of speaking of a person who is foul-mouthed.

Japanese Meaning

口汚い人（悪口を平然と言う人） / 下品な、卑猥な口調で話す様子

Despite his charming smile, everyone knew he was a guttermouth who couldn't speak without swearing.

魅力的な笑顔にもかかわらず、誰もが彼が口の悪い人で、罵りなしには話せないことを知っていた。

Sense（1）

(informal) A foul-mouthed person.

Sense（2）

(informal) The obscene manner of speaking of a person who is foul-mouthed.

guttermouths

（ plural ）