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1.
This shows that courtesy is not dead. It's a very elegant urban code for, "I DONT CARE" but more accurately,"I REALLY DON'T GIVE A FLYING FUCK".
In some communities it means "YEAH, LIKE THAT'S GOING TO HAPPEN". So if something actually does happen you can never be called out and say it never happen.
expl.Friend 1. I would like to study computers. There is good money in it and you dont have to work so hard.

Friend 2.You aren't logic minded enough to study computers,"good luck with that"!
by Urban Dictionary November 11, 2006