cut oneself on

cut (oneself) on (something)

To accidentally cut or gash a part of the body on something, typically a sharp object. We came back early because Jeff cut himself on a shell at the beach.
See also: cut, on

cut oneself on something

to slice one's flesh with something accidentally. Careful, you will cut yourself on that knife. Careful! Don't cut yourself on that broken glass.
See also: cut, on