You are probably going to marry this person someday. Not sure when or a little of if. However, you continue to date this person while maybe seeing others. Something will happen to escalate the relationship ie. pregnant, roommates or other that seals the deal. You'er now going to get married.
Yeah, we knew we were going to get married someday, we've been mate-dating, playing house and now we know were going to do it.
by The Real Shaman November 20, 2015
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Going somewhere or doing something that would traditionally be considered a romantic or 'date-like' venue or event with someone who is a friend and you have no plans to be romantically involved with. Traditionally used to describe a female-male pairing
Tom and I had an awesome mate date, we went ice skating, went for dinner and had a stroll along the beach
by indierocknroller March 1, 2010
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A date which consists only of sex, therefore starting and ending with mating. Also known as a one night stand.
Promiscuous guy: I need a real relationship...I'm tired of all these mate dates.
by Schnitterbit April 11, 2011
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Something you would normally do with a girl but instead you do it high with your guy friends as no females are available.

(Being in the high state makes it not gay)
Hey bro she doesn't want to go to the movies shall we make it a mate date?
by GenisisII April 21, 2011
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A gay romp between trraditionally straight men involving several members, generally taking place after a group outing with no females present.
The blink 182 concert was going to be this awesome mate date until Lauren had to interfere by coming into town...
by Pitt 3rd floor June 7, 2009
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to choose your friends over your girl/boyfriend.
usually used by a third party... "you should have come to leopolds's birthday party instead of her parent's wife swapping party, mates before dates."

or

"ofcourse i'm coming to leopolds's birthday party, mates before dates, right?"
by Tankman R. December 21, 2007
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A significant other that does not identify as male or female.
Also see: genderfriend
Eh man, this is my date mate Andrew, mind if they tag along with us?
by comander_kiwi July 10, 2015
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