by Sparkles Chronike January 13, 2008

by LongLiveRock July 26, 2005

Sexual act in which the male participant inserts one thumb in the female participant's vagina and the other in her rectum, while saying "Heeeyyeee!"
by Mister dbagg April 18, 2008

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
by Dan S.....H May 23, 2006

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

- "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!
- Yo Jack, dude I got fonzie'd yesterday!
by Guere April 10, 2004

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".
by PeterPan425 November 5, 2013
