1 definition by thecockblockersss

Top Definition
A ridiculously strong and ever-lasting oath. If broken, results in flipping off the promise-breaking party by the promisee as well as loss of respect and other unspeakable emotional, physiological, and physical consequences. More binding than a pinky promise. Abbreviated as MFP.
I flipped her off after school today because she hooked up with him, even after she Middle Finger Promised me she wouldn't.
by thecockblockersss June 14, 2010

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