פִּרִכֵּס II, (preced.) [to rub, grind,] to move convulsively, to struggle, kick. Ohol. I, 6 הותזו … שמְפַרְכְּסִים וכ׳ if their heads have been cut off, they are unclean (as corpses), although they still move convulsively; כגון זנב … שמְפַרְכֶּכֶת like the tail of the lizzard which moves (after being separated); Tosef. ib. II, 1. Y. Sot. IX, beg. 23ᵇ חלל ולא מְפַרְכֵּס it says ‘slain’ (Deut. XXI, 1) but not struggling. Ḥull. II, 6 עד שתְּפַרְכֵּס ביד וכ׳ unless the animal (when slaughtered) kicks with the foreleg and the hindleg (v. פִּירְכּוּס II). Gen. R. s. 63 יעקב מפרכס לצאת Jacob (in his mother’s womb) struggled to come out; a. fr.