a masterbathon is a day that you stay home from school "sick" so you can beat off so many times that you are dry and chaffed and can't walk so the next day you have to stay home and do it all over again
A mask wearer who derives pleasure from...
1. Wearing masks in stupid places (ie: their car, shower, or bed.
2. "Enforcing" mask wearing by yelling at others to put their masks on.
Karen is such a maskerbater. She just peered over and yelled, "Hey! Stop being a murderer. Put your mask on!" - I was pooping in a stall.
A confined space used for masterbation. A masterbatorium will sometimes have pictures of naked bodies hanging on the walls for visual stimulation. Those little rooms in the porn store that you stick quarters in, those are masterbatoriums. A masterbatorium will generally smell of lotion or crusted semen. You get a feeling of filth when you walk into a masterbatorium.
The guy who lived below me had his room completely wallpapered with centerfolds of Playboy Playmates, this was obviosly a masterbatorium.