Green’s Dictionary of Slang

haemorrhoids, piles.

1997		Roger’s Profanisaurus in Viz 87 Dec. n.p.: Nobbies rhym. slang. Piles; Emmas; bum grapes. From Nobby Stiles, combative, bald, false teethed 1966 World Cup winning English footballer.
2003		B. Dark Dirty Cockney Rhy. Sl. 83: I’ve been sitting on a rubber ring all week and my Nobbys still hurt.