If your friend just texted you "KMG" and you're now looking for the definition, it was just a typo of "OMG". That's all it was.
Becky: KMG!!! HARRY STYLES IS COMING TO MONTREAL!!!!!
Rachel: *looks up definition of KMG on Urban Dictionary like an idiot*
Rachel: *looks up definition of KMG on Urban Dictionary like an idiot*
by Chickymomo January 09, 2022
Abrv: kill my gynecologist, commonly used by females who are experiencing troubles with their reproductive parts
by Know-Bod - E February 17, 2011