BT Ḥul 51a(34) :ההיא אימרתא ٠٠٠ דהוו שדרו כרעי בתריתא‏ : that lamb whose hind legs were twisted
See the entire entry for ˀimmrā, ˀimrəṯā n.f. ewe lamb

BT Ḥul 51a(34) :ההיא אימרתא דהוה בי חיבו̇נ̇יא דהוו שדרו כרעי בתריתא‏ : a certain ewe that was in GN whose hind legs were twisted (?)
See the entire entry for šdr#3 vb. to be twisted or deformed