Definition of genny:
(n) :
(slang) A person from the suburbs who moves to a low-income urban area.
(n) :
A female given name, a diminutive of Genevieve, or occasionally a variant of Ginny or Jenny.
(n) :
(video games, slang) A Sega Genesis video game console.
(n) :
(slang) Clipping of generator (“device that converts mechanical to electrical energy”). [One who, or that which, generates, begets, causes, or produces.]