Green’s Dictionary of Slang

Molly O’Morgan n.

[rhy. sl.]

an organ.

[UK]J. Franklyn Dict. of Rhy. Sl.
[UK]S.T. Kendall Up the Frog.
[UK]Dodson & Saczek Dict. of Cockney Rhy. Sl.
[UK]R. Puxley Cockney Rabbit.