A chubby girl who makes you ejaculate early because she is so aggressive in bed. A girl who doesn't have sex often and screws like it is going to be a while before she gets it again.
Dude Jenn is such a quickspurt. I gotta find a girl who isnt a quickspurt.
"Did you see that Kickstarter project for the Lizzie Bennet Diaries on DVD?"
"Yeah! They reached their goal really quickly, and there's still thirty days left!"
"That was a real quickstarter!"
Mathematics done with a focus on speed of calculation rather than accuracy. This change in priority often results in wild approximations and unvalidated assumptions, leading to low quality answers. Often used in rough-work to check previously calculated answers, or in physics-related pub arguments.
See also, napkinmath.
Red: Quick! How much worse would it be for Venus to crash into the Earth than Mars?
*pause for quickmath*
Blue: Well, Venus has twice the radius, and it's a volume, so... 8. It would be 8 times as bad.
Red: Wow. Science is awesome.