جفأجَفَأَ, (S, K,) aor. ـَ (K,) inf. n. جَفْءٌ, (S,) It (a valley [flowing with water]) cast forth froth, or foam, (S, K,) and particles of rubbish or refuse; (S;) as also ↓ اجفأ; (K;) but this latter is said in the O to be of weak authority. (TA.) And جَفَأَتِ القِدْرُ, and ↓ اجفأت, The cooking-pot  cast forth its froth, or foam, (S, K,) in boiling: (S:) or جفأت بِزَبَدِهَا it cast forth its froth, or foam: (Ham p. 132:) originally جَفَت and اجفت, without ء. (Er-Rághib, TA in art. جفو.) A2:  جَفَأَ الوَادِى, (K,) or جَفَأَ الغُثَآءَ عَنِ الوَادِى, (IAar, O,) He (a man, IAar, O) swept off the scum and rubbish of the valley [after it had flowed, or while it was flowing, with water]. (IAar, O, K.) And جَفَأَ القِدْرَ He cleared off the froth, or foam, of the cooking-pot. (K, TA.) b2: Also جَفَأَ القِدْرَ, (S, Z in the Fáïk, TA,) inf. n. as above; (S, TA;) and ↓ أَجْفَأَهَاس; (Z ubi suprà, TA;) but the former is that which is commonly known; (ISd, TA;) the latter is rare; (IAth, TA:) or the latter should not be said, though it occurs in a trad., (S, TA, *) accord. to one relation; (TA;) He turned the cooking-pot upsidedown, or inclined it, (S, Z ubi suprà, TA,) and poured out what was in it: (S:) or he emptied the cooking-pot, and turned it upside-down: (TA:) and جَفَأَ البُرْمَةَ فِى القَصْعَةِ He turned the cookingpot upside-down upon the bowl. (K.) b3:  جَفَأَهُ, (S, K,) [like حَفَأَهُ,] and جَفَأَ بِهِ الأَرْضَ, (TA,) He threw him down, or prostrated him, on the ground: (S, K, TA;) namely, a man: (S:) and بِهِ ↓ اجفأ [signifies the same; or] he threw him, or it, (K, TA,) on the ground. (TA.) b4: See also 8.4 أَجْفَاَ see 1, in four places.8 اجتفأ He pulled, or plucked, up, or out, or he uprooted, (S, K,) and threw down, or away, a thing, (S,) or plants, or herbs, such as are termed بَقْل, (K,) and trees; (TA;) [but see احتفى;] as also ↓ جَفَأَ, (K,) aor.  and inf. n. as above: (TA:) [or] both signify he cut a plant, or herb. (IAar, Nh.) جُفَآءٌ What is cast forth [of froth, or foam, and particles of rubbish or refuse, (see 1,)] by a torrent: (ISk, S:) the froth, or foam, cast forth by a valley [flowing with water]; and by a cooking-pot, (K, TA,) in boiling. (TA.) b2:  Hence, as being likened to the froth, or foam, of the cooking-pot, of which no use is made, (Fr, TA,) i. q. بَاطِلٌ [meaning A thing that is worthless, useless, or unprofitable]. (Fr, K, TA.) It is said in the Kur [xiii. 18], فَأَمَّا الزَّبَدُ فَيَذْهَبُ جُفَآءً, meaning بَاطِلًا [i. e. Now as to the froth, or scum, it passeth away as a thing that is worthless, or useless, or unprofitable], (Fr, S, Jel, TA,) and thrown away. (Jel.) You say also, ذَهَبَ الزَّبَدُ جُفَآءً, meaning [The froth, or scum, passed away] driven from its water. (TA.) b3:  جُفَآءٌ مِنَ النَّاسِ, occurring in a trad., is explained by IAth as meaning The first, or foremost, of the men or people (سَرَعَانُهُمْ): but Bkh and Muslim read (instead of جفاء) أَخِفَّآءُ, pl. of خَفِيفٌ. (TA.) A2: Also, [like جُفَايَةٌ,] An empty ship. (O, K.)