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.
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.