BT Ḥul 42b(18) :האי בוקא דאטמא‏ : the joint of the thigh (bone)
See the entire entry for bwqˀ#2 n.m. thigh joint

BT Ḥul 42b(18) :האי בוקא דאטמא דשף מדוכתיה‏ : a thigh joint which was dislocated [lit. slipped from its place]
See the entire entry for špp vb. to crawl, to be low; D to treat with disdain; C to yield