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1.
An acronym for Arsenal FC, based in London, England - founded in 1886.

"Come On You Gunners!"
or
"Come On You Gooners!"

Gooners = supporters of AFC.
See above.
COYG = Come On You Gunners
by BLarsenAFC1886 March 07, 2011
 
2.
Acromyn. Come On You Gills.

A chant made online, to represent what would be said in the stands of Gillingham FC.
Generally only fucktards would use this as nobody outside of Medway or the Irn Bru Sunday League have heard of them.
A) ''COYG!''
B) ''What the fucks that?''
A) ''Come on you Gills!''
B) ''Hmmm, Twat!''
by footballs greatest mogul May 13, 2009