«يُفُوتَكْ مِنِ الْكَدَّابْ سِدْق كْتِيرْ»

Someone who lies constantly cannot possibly lie about everything; some of what that person says will turn out to be accurate. Rejecting every word from such a speaker means throwing away the genuine information mixed in with the falsehoods.

The proverb counsels discernment over blanket rejection; it neither praises liars nor excuses lying. A bad reputation for honesty is a reason to weigh and verify what is said, not to stop listening, because the overlooked truths may be exactly what one needs to know.

Use it when someone wants to ignore a known exaggerator or liar outright. It reminds the listener that even an unreliable speaker sometimes reports something real and useful, so the claims deserve checking rather than blanket dismissal.