Mexican knife
A broken bottle used as a stabbing weapon
Bob cheated with Steve's whore wife, so Steve stabbed Bob with a Mexican Knife
mexican knife fight
A knife fight, usually between two individuals, particularly unique in the fact that they have duct taped their hands together in a hand-shaking gesture while holding the knives in their unbound hand. Usually conducted to settle a dispute over food, money, drugs, property, or prostitutes.
Jim and Mike got in a huge arguement last night. Being the gentlemen that they are, they amicably agreed to settle their dispute via a mexican knife fight to the death.