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A knife carried by Jamaican bad boys. The locking pin is equipped with a ring that your index finger fits through. When you pull on the ring it moves the locking pin so the blade can swing out. Bad Boys often file the locking pin down so the blade can easily open, usually with a flash of the hand.
Jamaican RatchetRatchet (Jamaican)
by 320ro March 10, 2013
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