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Firmativity 

(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."
Firmativity by Kosmilly May 2, 2009
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Paranormal Frativity 

Strange happenings that manifest at night and cannot be remembered, usually due to cheap beer and shitty vodka.
Bro #1: Dude, why the fuck is there a bra in the hallway and the living room covered in flour?

Bro #2: I dunno man, I was blacked the fuck out. Must have been some paranormal frativity.
Paranormal Frativity by steezycheese September 20, 2010

Frativity 

Activities done by those humans within a fraternity
6th street tonight was full of frativity.
Frativity by Rileyjalowy October 3, 2015
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