When the man (or female) sticks his or her thumbs in their partners ass hole and pulls them out and does the EHHHH just like fonzie from happydays
Fonzie: Ehhhhhh... similar to a dirty sanchez and whatnot
by Dan S.....H May 16, 2006
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when one takes their thumb/s and jams it up the ass of someone nearby and unsuspecting
Kid:" I'm going to Fonzy scott"

Scott:" O my ass!"
by tdo December 14, 2007
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I don't feel too good today guys. I think I might have the fonzies... "eeeeeyyyyyds" (ala the fonz, with appropriate thumb gestures).
by DcTurner October 26, 2003
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very sexy, very out-going, usually loves the same sex, confused, mental, has a bestfriend preferably named brianna, LOVES his bestfriend, obsessed with his bestfriend, and 100% bangable for any type (animals included).
brianna- "did you hear about fonzy having sex with a snake last weekend?!"
david- "no, i wish i could have that skill".
brianna- "........."
by maryjanekey May 28, 2009
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Bunch of dutch friends who make 1337 movies. Also one of the best Dutch CS clans.
- "MOTHERFUCKER did u see that new Movie, but still not even close to that one by fonzie"

- Yo Jack, dude I got fonzie'd yesterday!
by Guere April 10, 2004
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Comes from the initials "FZ" meaning Friend Zone. It can be a male or female. If you have a girl/guy who's put you in the Friend Zone, he/she is your "fonzi".
Man! That girl is hot! Too bad she's just one of Joe's FONZI's.
by PeterPan425 November 5, 2013
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