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1.
Irish word for useless
She has a gammy leg...
by Cully April 01, 2003
 
2.
The sudden overwhelming shock of confusion, which is sometimes shortly followed by a groan of delirium. This is sometimes referred too as a "Gammy Descention" which in some cases has been found to make people vomit.

Other words used to express this emotion are:

Gammecular, Gammful, Gammual, Gam.
"Mate, That tortoise with seven heads and a leg without a knee was Gammy."

"I don't know if its the acid or not but im going on a gammy descention..."

"Sometimes I like to play with fire while licking my dogs anus..." (This is Gammy/Gammecular/Gammful/Gammual)
by Borkaor August 02, 2010
 
3.
Something infected, disgusting or generally dirty. Especially used to refer to injuries or disabilities.

Used in Gloucestershire, UK.
Hannah: Dave's got a gammy knee after he grazed it. Looks rank.
Dave: It got gammy 'cause a bit of grit got stuck in there. Now it's infected.
by JJome February 08, 2011
 
4.
Scottish slang (Aberdonian).A blow job.
I fancy a gammy fae that quine claire.
by monkeyface August 25, 2004
 
5.
It basically means disgusting or minging. If an orange has gone all green with puss and stuff that would be deemed as gammy
Paul: Have you seen this orange?
greg: ergh it's proper gammy
by Clive Warren January 11, 2009
 
6.
endearing word for grandmother
by Heather November 09, 2003
 
7.
London slang; referring to something so sick ugly that it pains the onlooker to view it
1) He's got a gammy face!
2) His face is so gammy!
3) Wow, how much more gammy can his face get?!
by jashond October 20, 2009