razor backed
/ˈreɪzər ˌbækt/
adjective
- Having a back that is thin and sharply ridged, like the edge of a razor.
- We hiked along a razor-backed ridge with steep drops on both sides.
- The dinosaur had a razor-backed spine with tall bony plates.
- The razor-backed hog is a breed of pig with a narrow, arched back.