«اِلْعَوِيلْ لِسَانُهْ طَوِيلْ»

The saying links meanness of character with an unbridled mouth. Here the subject is a base, worthless person, not wailing or lamentation. Such a person is expected to be quick with rude, shameless, or foolish words, as though the coarseness of the speech flows from the flaws within.

It works as a verdict on someone's worth judged by how they talk. The long tongue means insolent, abusive speech, not eloquence or mere talkativeness; such chatter is treated as a symptom of baseness, so the proverb both describes such people and quietly warns against trading words with them.

Suited to remarks about someone of low character who answers with insults, crude retorts, or brazen talk. Because it labels the target as contemptible, it is a cutting judgment rather than a neutral observation, and is better kept for disparaging commentary than for polite exchange.