Definitions of razorback:

• noun:   a mongrel hog with a thin body and long legs and a ridged back; a wild or semi-wild descendant of improved breeds; found chiefly in the southeastern United States
• noun:   any of several baleen whales of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin
• adjective:   having a sharp narrow back

  Example: "Razorback hogs"