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1.
What looks like a date from outward appearances, but takes place with no romantic intent. Neither party gives anything away in terms of physical or emotional binding. Used as a fact finding mission to determine if two people are interested in starting a relationship without the complications that often go hand-in-hand with a date.
Man: This undate was really fun. Should I kiss her goodnight? Oh, right, this was an undate! I don't have to worry about it.
by Loquacious42 February 24, 2014
1 0
 
2.
When two people go out on what seems like a date, but one or both of them aren't really interested in the other person as a potential boyfriend or girlfriend.
guy: Hey, you want to get some dinner?

girl: Sure! Umm, is this a date?

guy: It may look like one, but no, I'm not interested in you at all.

girl: Oh good, we can undate each other until we find real dates.
by bambolii April 19, 2012
1 0
 
3.
The attempt of re-friending someone that you used to date right after the breakup.
A: Hey, I miss your company. Why don't you come out for a movie or some drinks?
B: I'm sorry but I don't undate people. It feels too awkward to me.
by m_kid February 22, 2013
0 1
 
4.
1. the opposite of a date 2. specifically planning a date and time to annoy someone 3. Planning to go out and piss off a girl when you know she is pmsing
I found out when the girl will be pmsing so we will go on an undate to a crappy place and ill see how mad she gets
by tim johnss April 13, 2010
2 3