'Foul mouthed' in the Bible

[Psa. 5:9 says], "Their throats are like open graves [i.e., they are foul-mouthed]. They have spoken deceitfully." [Psa. 90:3 says], "There is snake venom under their lips [i.e., their words are deadly]."

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.