خلب

خُلَّبٌ خلب (assumed tropical:) Clouds (سَحَابٌ, S, K, TA) that thunder and lighten, (TA,) containing no rain: (S, K, TA:) or whereof the lightning flashes slightly, so that one hopes for their raining, but which deceive the expectation, and become dispersed: as though derived from خِلَابَةٌ, the “ deceiving with blandishing speech. ” (IAth.) And البَرْقُ الخُلَّبِ and بَرْقُ خُلَّبٍ (S, K) and بَرْقُ الخُلَّبِ (K) and بَرْقٌ خُلَّبٌ (A) (tropical:) Lightning with which is no rain; (S, A;) as though deceiving: (S:) that excites hope [ of rain ] and breaks its promise. (K.) Hence the saying, to him who promises and does not fulfil his promise, اـِنَّمَا أَنْتَ كَبَرْقٍ خُلَّبٍ (assumed tropical:) [ Thou art only like lightning with which is no rain ] (S.). And فُلَانٌ خُلَّبٌ قُلَّبٌ (assumed tropical:) Such a one is sharp in intellect, clever, ingenious, skilful, knowing, or intelligent. (JK.)