Top Definition
An arbitrarily defined value, usually abbreviated by a J in equations, which adjusts for errors in the process of calculation. This is generally used by physics students who are unable to achieve expected results through experimentation.
According to our data, all of the ice caps will melt in 34 days. So I threw in a little j-factor that bumped it up to 94 years.
by TalkSauce February 19, 2007
A complement named to anyone who can "j" (also known as jizz, excluding pre-pubescent children) when something happens, as in real life or a video game.
"Damn, J Factor, you just raped that joan!"

"Fuck yeah, J Factor!"
by Joanse Cos December 05, 2009
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