This is when a girl is giving you dome whilst doing an upper decker in your parents bathroom while they are asleep.
Yo cindy gave me a upside down double reverse blumpkin supreme in my parnets bathroom while they were asleep
by ROBE to the RT December 20, 2005
When a group of older, cooler guys, ejaculate on a younger, nerdier guy before taking his socks off and wiping their dicks with them.
"Me, Arzen and Duate totally gave Rob a upside down double reverse blumpkin supreme last night in C&G"
by NoodleBoy April 19, 2006