Georgia prison slang for a non-alcoholic social drink concocted of instant coffee, kool-aid, and nearly any flavor of soda (but usu. cola.) This drink is primarily consumed by a group, with everyone pitching in to make the bombays. For example, a couple folks bring the soda, another the kool-aid, another the coffee, and the broke people who can't afford to bring ingredients (GA doesn't pay its inmates to work) will get the ice, find seats, or brew the bombays and everyone will sit and talk and drink bombays. Bombays, with their extremely high caffeine and sugar content, get everyone "geeked", which, along with the expensive nature of the brew, account for its being a social drink.
"Yo, last night me and t-bo and lil philly was up geekin on bombays till lockdown!"