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Noun. One of two forces that cause breasts to slowly sag towards the floor. Along with gravity, the force of grabity causes a constant pulling, rubbing, tugging and stretching of the breasts. The force is propotional to the sensitivity of the breasts and the attractiveness of their owner and increases exponentially in the presence of horny, attractive men.
If it weren't for the force of grabity I'd still have a "B" cup.
by Harper456 April 07, 2011
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2
A natural force that causes one creature to grab or grope another.
Overcome by the force of grabity, Bottom sank his claws into the bunny’s flesh.

“I would not,” he explained to the bunny, “invade your personal space in this way, were it not for the force of grabity.”
by Bottom Ford April 18, 2010
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