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1.
1) To tell a story, which more or less at any given moment contains a dubious amount of exaggeration. (To spin a yarn)

2) To have conversation with someone, most likely pertaining to trivial matters.
1) To spin a yarn - "One time I saw this dog driving a car, and it was wearing a cape!"

2)"I'll see you later on, we'll catch up and have a bit of a yarn"
by wads millenia October 08, 2003
 
2.
Weed, Or a type or pot or Young Ass Reckless Nigga.
Where the yarns at?
you got yarn?
by Suuwooop April 29, 2012
 
3.
Fibre. Natural or synthetic, for example wool, nylon. Often found as one continuous thread bound into a ball, used for knitting.
"the damn kittens got my ball of yarn! how am i going to knit my leg warmers now!"
by hal October 13, 2003
 
4.
Instead Of Yeah
or
Instead of Awesome
nartwell: "Did you get that Joke?"
spunkmeyer: "Yarn."
or
Bort: "Let's go smoke some dope"
goose: "Yarny"
by Mikel May 14, 2003
 
5.
Yarn is a slang term for fight used mainly in Australia
A guy insults you and you would say "you want to yarn mate"
by AusPride February 06, 2008
 
6.
Name of one who is not good enough to be string.
He's not good enough to be string, so we call him Yarn.
by Grendal July 14, 2004