To act crazy and not be able to stop. This can either be a bad or a good thing.
OMG, we were lunchin' all night!

Man why are you lunchin'?

He was lunchin' so I left!
by Quantier October 12, 2006
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not focused, zoning out or in a daze, not on top of your game, passing up a golden opportunity
I can't believe didn't hook up with that chick. She was all over you the entire night. You must have been lunchin'!
by phorreel January 14, 2008
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well basically its the most univeral word that could possible be used. It is derived from the D.C area but is used religously in Crofton, Md aka C-town. Its to as an adjective that decribes anything you want it to describe. The key to this word is that if you've never heard the word that MD represents then it will be hard for someone unfamilar with our culture to ever grasp the concept in which the person is using it. This definition is lunchin. Also it can be good or bad.
by Aaron Cowell December 11, 2006
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existing in a strange or hallucinated state, behaving erratically or hilariously: lounging
last night we smoked a phat blunt and we were lunchin'
by veeman January 06, 2003
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Derives its meaning from "out to lunch", i.e. not with it, not really there.
You wanna fly to the moon? Man, you lunchin'!
by Scott Moore January 20, 2004
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To be taking it extremely easy, being lazy.
That guy is seriously lunchin' today. He needs to get back to work!
by mankerrigan September 06, 2009
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1. verb used to describe senseless actions and often used when under the influence of green
derived from the streets of naptown

yo that dude is geeking the fuck out, he's lunchin
by mexialyssa January 19, 2009
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