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1.
A girl that is bad for you but yet you keep going back to her, because she is so good. (Im lovin' it)
My mcgirl friend is so hot my wife would be pissed.
by MC JOEY January 05, 2011
 
2.
1. When you have a girlfriend that works at mcdonald's.

2. A girl that works at mcdonald's that gives you discounts because she wants you to ask her out.
1. Sorry man, can't make it until 9:30, I have to stop by mcdonald's and see my mcgirlfriend

2. Dude, did you hear about my mcgirlfriend? She gives me sweet discounts!

by PDiggs June 20, 2007