From Longman Dictionary of Contemporary Englishgammygam‧my /ˈɡæmi/ adjective British English old-fashioned MIa gammy leg or knee is injured or painful
Examples from the Corpus
gammy• The idea was to put him in it from time to time to give his gammy leg a rest.• He ran the short distance down the side-street as fast as his gammy leg would let him.Origin gammy (1800-1900) → GAME2 2 