Green’s Dictionary of Slang

(Anglo-Ind.) pampered, indulged.

1881		G.R. Aberigh-Mackay Twenty-one Days in India 127: All the gram-fed secretaries and most of the alcoholic chiefs were there; but the famine-haunted villager and the delirium- shattered, opium-eating Chinaman, who had to pay the bill, were not present.
1886		Yule & Burnell Hobson-Jobson 301/1: Gram-fed, adj. Properly the distinctive description of mutton and beef fattened upon gram, which, used to be the pride of Bengal. But applied figuratively to any ‘pampered creature.’.
1912		letter in Civil & Milit. Gaz. (Lahore) 8 Sept. 8/1: Is the Civil Service then so very much more ‘gram-fed’ than the Indian Medical Service?