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1.
The stupid/retarded/moronic/idiotic persons way of spelling "again" on the computer
Caroline: OMG N0T U AGIN!
Paulo: WHAT THE FUCK? Learn how to spell you stupid bitch
Jason: Yeah you fat fuck, what the fuck is your fucking problem?
Mary: Hey guys stop making fun of her
Pat: u guys r prolly gunna get hit bi me
by J-low77 May 03, 2006
 
2.
In return, another time,once more
Can we please do this agin. (a-gin)
(another way of spelling again,but the same sound in speaking.)
by regardless devon victory May 07, 2010
 
3.
Against, or in the vicinity of.
Dang, 'at 8-ball's nigh up agin 'at rail ain't she?
by sam middendorf May 03, 2005
 
4.
a complete and total bag of douche.
yo look at that guy over there playin tennis, he is such an agin
by Duncan Anderson November 15, 2006