Top Definition
A piercing on the third finger of the left hand to hold a diamond that shows that a girl is committed to a boyfriend.
That's not a ring she's wearing. It's a promise piercing. That's a rock stuck in her finger like a nose stud. I wish a girl could show that kind of commitment to me. I'm lucky if I don't get stood up for tacos at Tacky's.
by North Central Johnny June 26, 2009
5 Words related to Promise piercing

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