A Canadian $10 bill. Called a Mac D because the first Prime Minister, John A. Macdonald is on it.
Yo, can you trade me two Laurier's for a Mac D?
by Malcolm X-Terminator May 25, 2008
a lowly person who uses internet date sites to meet women, flattering them to make them feel special for the purpose of having sex...then dumping them and making them feel like they've done something wrong to cause the breakup while happily moving on
"That bastard Bill was going out with Mary and then he mac'd her. He's such an insensitive prick, he does it all the time"
by Steven December 06, 2007

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