i-adjective
foul-mouthed; abusive; using dirty language
Describes a person or their speech as using crude, insulting, or obscene words.
彼は口汚い言葉で相手を罵った。
He cursed at his opponent with foul language.
あの人は口汚いから、あまり
That person is foul-mouthed, so I don't really want to talk to them.
i-adjective
Rare, old-fashioned usage; refers to someone who is greedy or voracious, especially about food. Modern Japanese more commonly uses 欲張り or 食いしん坊.
古典では、口汚い人物が大食いする場面がある。
In classical literature, there are scenes where a greedy character eats voraciously.