The act of inserting a thumb into the anus during intercourse. Inspired by the Happy Day's character,Arthur Fonzerelli, who was fond of giving the thumbs up and uttering "Aaaaaaa(nus)."
Greeting: A sign of ones own coolness by sticking both thumbs up while wrist reman parallel to each other with elbos placed at the waist. Jiggle hands for enhancedemphasis upon coolness.
I threw fonzies in the wrong office and everyone thought I was there to fix the broken record player.
Even though you're throwing fonzies you still cant jump a shark in a leather jacket.