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A private act of self-congratulation involving flexing the bicep, jerking the elbow, bringing the fist in close to the chest and holding momentarily. Performed surreptitiously.

A more expressive alternative to patting oneself on the back.

May be abbreviated to sfp
John nervously hung up the phone after confirming his first date with the Head Cheerleader, marking the occasion with a solo fist pump.
by ilovemavis June 01, 2010
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