Green’s Dictionary of Slang

1. (UK Und.) a quartern loaf [brown george under brown adj.² ].

1812

Vaux Vocab. of the Flash Lang.

2. a penny [the picture of George IV on the coin].

1821

‘A Real Paddy’ Real Life in Ireland 18: They stuck to him like fogle-hunters, eased him of the jingling Georgy’s.

3. a policeman.

1929

Gloucester Jrnl 2 Oct. 1/5: ‘All right, Georgies,’ (the nickname for detectives) remarked the prisoner, ‘the game is up. I will come quietly’.