1. In the USA - Doin' is simply short slang for the word "doing." It may be used in many ways, but the jist of how it is used is practically the same.
Hey Boy! What are you doin' over there behind the shed? Come outta there before I shoot ya fulla holes!
by IrishDaddy2U April 12, 2010
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Referencing a phrase used by the post-hardcore band, A Skylit Drive.
by ajx February 20, 2010
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Someone who is on top of his game.
Did you see that kid dance, yo he's doin it.
by Dominic October 3, 2003
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The act of sex. Mainly a UK term, but may be international, can't be sure.
Oh no, Ben and Jo are doin' it again, GET A ROOM GUYS!
by Minardi June 18, 2005
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A generic term used to identify an item that you cannot think of the actual name of at the time. Pronounced (doo-INZ).Used in place of 'thingy' and 'thingmabob' and 'thingmajig'. Often used with a term that helps to identify the object. Originated in the Maritimes of eastern Canada.
Pass me the square black doins that is sitting right there on the coffee table.
by Rob Milner August 11, 2008
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1. A shorter way of asking what somebody is doing
2. A quick way to answer the phone
3. The word for saying hello, whats up? all at once
1.Person 1 Hey doin?
Person 2 not to much, doin?
Person 1 not a whole lot etc...

2.Person 1 (answers phone) Doin?
Person 2 Hey doin?
Person 1 nothing really u?
Person 2 same etc...

3.Person 1 Doin?
Person 2 O hello, not to much, doin?
Person 1 not a whole lot etc...
by Sunny Sunguard December 12, 2008
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