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The art of fucking a girl from behind (vaginally) and then pulling out and forcefully sticking it in her ass thus causing her to kick backwards in a bucking fashion. The bucking will normally be in the old nutsack area which may be pleasureable to some men.
I've always wanted to date an equestrian, but I am afraid she may be a bucking filly.
by Two Girls One Cup December 21, 2009
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