gammy /ˈɡæmi/adjective 3noun 1forms 3 adjective3 •Injured, or not functioning properly (with respect to legs).I have got a gammy leg, and can't walk far. •(slang, no longer used) Bad; unfavourable. •(slang, no longer used) Fake; counterfeit.A little bit of real lace would be fixed on this as in process of making, and a lot of "gammy" stuff, imitation lace, would be carried with it. — 1891 noun1 •(informal) Grandmother.Had our beloved gammy lost it? formsgammies · gammier · gammiest