The act of giving a hand job with furious wrist action

Someone who is possessed by clout chasing. The original human is now gone and a demonic entity that feeds on clout is all that is left. An empty shell with no control of their actions, forced to blindly react to situations they think will bring them attention.

Possessing the qualities of a wrist.

Also see: Giulia Giordano

Another bleak play on words for a hand job from a male or female.

What's known in Yank-land (America) as a "hand-job."
Basically, a woman manually stimulating a man.

when a female masturbates a penis

All the other definitions of wristy are wrong. The wristy is actually sort of a "high-five" alternative where one bends his/her wrist about 45 degrees, also making a very slight fist, and makes contact at the wrist of another person doing the same thing. Used to celebrate the mention of the number five, a shared amusement, or a mere agreement.