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1: An expulsion of air released by the penis.
2: A reference to someone that will never make it in the real world, or is too much of a pussy to get shit done. This originates from the fact that "penisfarts" never happen.
Tice: Yo whats up with Morgan? He's been failing all his tests and he never goes out anymore.
Dylan: Yeah I heard he's been a real penisfart recently. He needs to step his game up.
Tice: True, true.
by DPollydaWeasel October 05, 2011
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A possible after-affect of a bladder exam. During the exam the bladder is inflated with air making it possible for residual air to cause a "fart" when peeing.

Sound wise a "penis fart" can resemble a queef or the sound a hose makes when extra air escapes.
I never knew it was possible to let a penis-fart until I got a bladder exam...
by Sue Doe Nyhm April 22, 2010
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When gas is emitted from one's penis.
Guy one:"dude what was that noise?"
Guy two:"penis fart!"
Guy one:"you mean you just shot gas out of your dick?"
Guy two:"thats right!"
Guy three:"thats hot"
by theonewhoiscoolio October 23, 2009
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The passing of air out of the urethra of the penis during manual, oral, vaginal, or anal stimulation.
Hell no, what was that sound you did not just have a penis fart in my pussy. Did you?
by Timothy July 09, 2004
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a commonly used noun oversaid by stupid teenagers that have nothing else to say or do. Immediate punchline, or punch in the face
by TruthSpeaker August 09, 2004
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A penis fart is when you sleep with someone and you know it to be an absolutely horrible idea but yet you still hit that anyways.
'Man last night i had the biggest penis fart...... cant believe i did that to your sister'

'Dude, she made the titanic look small, that was such a penis fart'

'Why is it everytime I go to Mooseheads bar I wind up having a penis fart?'
by Piltzener September 22, 2009
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