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Verb; Planting your foot temporarily and quickly against a hard surface mid-air through a maneuver.
As he peaked his jump off the half-pipe, he did a fastplant against the wall before coming down.
Losing centrifugal motion while riding a BMX bike sideways around a curve, you'd better fastplant or gravity will take over and you'll eat dirt.
by just_a_car February 09, 2014
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