masturbasement 

secluded, underground space in your home where you can finally jerk off in peace

"After my wife goes to sleep and I kick all of my guy friends out of my downstairs mancave, I get out my pornos and turn it into my very own private masturbasement."

masturbasement by Eric Rohmer October 10, 2014

masterbasement 

it is a word that is harmless but actually is like a double untandra, or also a slip on words. its sounds much like masterbating or masterbation. it is used jokingly so it masks the other word

man, im going to masterbasement to her picture

masterbasement by wag 1 June 29, 2010