2 definitions by Mitsuda

Combination of "Peter Out" and "Jam Tart". The name that you call someone when they peter out on a plan or party.
James: "I have to head home guys."
Bob: "You're petering out on us man?"
James: "Yeah, have to head out."
Bob: "Oh man, Peter J Tart. I can't believe you're jam tarting on us man!"
by Mitsuda August 9, 2007
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The act of dropping out of a plan or leaving a party.
James: "Sorry guys, I have to head home."
Bob: "Don't peter out on us James!"
James: "Sorry man."
by Mitsuda August 9, 2007
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