finger tutting 

Tutting originally started as an old type of dance, mimicking the moves that Ancient Egyptians used to do, nowadays it is a very angular dance using arms, hands and even fingers. Finger tutting makes angular shapes in a continuous routine, there is great variation in these moves so dancers can be creative and that's why it's so popular amongst them.

Check that mother fucker's finger tutting! Damn those are some weird shapes.

finger tutting by thatfreshkosovan November 3, 2013

fingerbutting

Sticking a finger up another person's asshole, or their own.

I caught Tom fingerbutting himself.

fingerbutting by Dr. Nardacci April 2, 2011