(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."
Used to refer to the technical skill shown as being demonstrated in a particularmotion picture, or as a blanket term in reference to the art of filmmaking itself.
Person 1: Just last week I happened to see Universal Soldier: Regeneration, starring Jean-Claude Van Damme.
Person 2: You don't say. How was it?
Person 1: As a matter of fact, utterly delightful. The Filmatism on display was truly exemplary. I doff my cap to all involved.
Person 2: Spiffing.
Person 1: Quite.