(noun) a date with a person that went exceedingly well. OR describing an act of flirtation that had very good or surprisingly good results.
A: How was that date with that new girl from the other night?
B: Dude, it was awesome -- total mackfest 3000

OR

A: How did it end up with that girl you met at the bar?
B: Total mackfest 3000 -- got her number and I've already got a date setup!
by Neo34 August 2, 2011
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