'Foul mouthed' in the Bible

nor thieves, nor the greedy, nor drunkards, nor revilers [whose words are used as weapons to abuse, insult, humiliate, intimidate, or slander], nor swindlers will inherit or have any share in the kingdom of God.

But now rid yourselves [completely] of all these things: anger, rage, malice, slander, and obscene (abusive, filthy, vulgar) language from your mouth.