The state of being of dryness, where one is incapable of dropping rain, or has flawed rain. Best used in the context of Beer Pong.
"Iain your are lacking rain so bad - your shot is flawed and you cannot hit a cup."
"Ew my god get off the altar with that flawed shit lack-of-rain of yours, that is fucking disgusting."
"Bro you like the tha Sahara the way you lack rain bro."