when you're driving and you slow down beside a pedestrian, and proceed to throw snowballs at him. Usually people do this for chuckles and giggles! Important note: This is illegal!
Nadine: Peter, what are you doing?
Peter: oh I was just drivebysnowing that old lady!
Nadine: Oh man! That's totally awesome!
Peter: yeah...
by Luxkkkkkkkkkkk February 24, 2007
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