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1.
A term used to describe the erratic driving behavior of old women and minorities after they have been passed very closely on the highway by a motorcycle moving somewhere between 120-190mph. This erratic driving puts the following motorcyclists in the group at risk because the drivers of the cars then slam on their branks, veer into different lanes, and sometimes even faint at the wheel. It has proven to be fatal in some cases.
Matts an ass hole he keeps splitting the lanes at 150 leaving me to dodge 15 shrapnel cars in his wake.

Did you hear that John died the other week?
Yea Matt left shrapnel cars all over I-95 for him. He dodged two old ladys but the haitian got him in the end
by shrapnel cars April 28, 2010