פִּרְפֵּר ², (preced.; cmp. פִּרְכֵּס I a. II) [to grind,] to move convulsively, struggle (in agony). Snh. 37ᵇ והרוג מְפַרְפֵּר and (you saw) the slain struggle; Shebu. 34ᵃ. Yoma 23ᵃ עדיין בני מפרפר my son is still moving (not yet dead; ib.ᵇ קיים); Tosef. ib. I, 12; Y. ib. II, 39ᵈ top; Sifré Num. 161; a. e.