Top Definition
Joyriding extranimo with a pile of live trout in your back seat and your rear windows open.

The spanflank count is the percentage of trout that remain in the car at the end of your ride. You want this number to be low.
I took Marl Spanflanking and he nearly pissed himself. We did have a spanflank count of 31 though.
by Roger The Shrubber May 05, 2003

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