cut oneself on

cut (oneself) on (something)

To cut or gash a part of one's body on some sharp object, especially accidentally. We came back early because Jeff cut himself on a shell at the beach. Tara cut herself on a shard of glass from the broken mirror.
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