look up any word, like tribbing:
 
1.
An eye-opening crappy experience that cures a person's crush. Usually happens on what the first person thought would be a date but turned out otherwise.
Guy A: "Dude, how was your date with Brandy?"

Guy B: "Awful! I spent the whole time painting her apartment while she talked on the phone with some other guy. I'm totally done with her."

Guy A: "Wow, sounds like quite an antidate."
by bayrunner January 19, 2011
 
2.
Having previously dated someone, and that someone claiming you did in fact not date. The time that you dated said person is known as "Anti-dating".
Boy: "Don't you remember our relationship?"
Girl: "We didn't date. You may think so, and everyone else may think so, but we didn't."
Boy: "So, we anti dated?"
by Pope Chris XIX November 25, 2007
 
3.
its when two friends who really like each other, hang out
tara and john are basically anti-date
by tarasmuchbetter September 21, 2009