look up any word, like dirty sanchez:
 
1.
Getting cars, machines and electronics etc., to work right after hitting them once.
My tv is blurry again, dang it. Watch me fonz it. I hit it in just the right spot, and presto.
by scrapforce July 31, 2010
 
2.
The act of being generally lazy, sleeping in, watching TV, using excessive amount of day time on the internet and doing other various lazy activities constant rather go out.
Jim declined going to the beach with his friends, instead he was going to just Fonz it at home.
by Joseph Yao February 11, 2008