Green’s Dictionary of Slang

groody n.

[coined by A. Burgess, A Clockwork Orange (1962)]

(US teen) in pl., the female breasts.

[UK]K. Sampson Awaydays 95: Great big dirty groodies, they are. Big fuck-off stretch marks right down the sides of ’em.
[UK]Roger’s Profanisaurus 3 in Viz 98 Oct. 16: groodies, grudiesn. Lady’s top bollocks.