Top Definition
(firm-a-tiv-ity)
: the level of firm; not weak; having a solid or compact structure
usually referenced to the firm level of a woman's ass or breasts.
One may judge the firmativity of an ass or breasts by firmly grabbing a palmful, then grasping and/or coressing the subjects goods, then judging by curves, proportion, and perkiness..will result in the determination of the Firmativity.
"So me and this girl were going at it and i reached down and grabbed her ass..i couldn't get over the firmativity of her ass..it was breathtaking."
by Kosmilly May 02, 2009
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