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The scientific explanation for the rattling of house windows when a car with a system passes down the street. Can also happen from inside windows to outside of the car. Also, when someone has nerve to put a system on a piece of shit car, the banging sounds can create racket along with loose parts on the car.
I was watching tv in my friend's livingroom and suddenly the windows began to vibrate and I heard very loud bass. I said, "Charlene, what the hell is that noise?!" and she goes, "Don't worry sara, it's just bumptivity. It's normal in the ghetto." Boy was I relieved.
by lv2ja2003 January 23, 2008
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Jul 19 Word of the Day
the art of remembering an arousing occurrence or some porn you watched while masturbating, often handy if you have no porn or your in the shower
dude i had the best memory wank the other night, i was thinking about that time I walked in on your mum in the shower
by fonzatron2000 April 28, 2007
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