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When two people pow-wow over the attractiveness of someone else who they were either just prior in contact with or within earshot to them and who has now left their space.

(Evolution of 'to mack on someone')
Scenario: two coworkers just made a beautiful customer a coffee at their place of work, but that customer has now left.

Coworker one: dude, that customer was a attractive! Drop every thing now, you need to start writing wedding vows!

Coworker two: nah , I saw you mac on that customer hardcore.

Enter coworker three: y'all micmackin' in here?
by Ikarus January 31, 2014
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