shiv
/ʃɪv
/noun North American informal
A knife or razor used as a weapon.Rosa Parks didn't make a shiv and start knifing people when she was arrested....
- For those who like more direct courses of action, getting your hands on a shiv or another weapon will probably be the first thing you want to do.
- Getting his hands on the first weapon he finds, he pulls a shiv, or a ‘homemade’ knife out of an inmate.
Origin
Probably from Romany chiv 'blade'.