My overly imaginative mind read "the tail end, so to squeal"
I never see whole oxtail, only prepackaged in maybe 2 " pieces. I can unfortunately imagine the squawking grannies if they were tussling tieh the butcher. Those poor guys.
I enjoy them stewd/braised in a prep like osso buco, and in a Caribbean style stew. For the latter I add yuca/cassava root- the textures together please me. When I see a guest looking around for etiquette direction I tell them it is proper to pick up the pieces to suck all the gelatinous bits off.