Definitions by Tankman R.

mates before dates 

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?"

mates before dates by Tankman R. January 8, 2008