Masterbasium 

A large building dedicated soley to the arts of masterbation. Masterbasiums can be open to the public or exclusive clubs open only to paying members. Most masterbasiums have 3 main rooms, one for males only, one for females only, and a unisex room. There are exceptions though like the famous masterbasium called Hot Stuff in San Fransisco which has no unisex room, but has multiple suanas, and butt plugs glued to every chair. Most masterbasiums have tight nit communities. Members tend to encourage each other with chants while masterbating sometimes even tickling eachothers buttholes.

Mackie: I'm bored... Let's do something fun.
Jimmy: I have an idea! I just joined this masterbasium and I have a guest pass! Let's go!
Mackie: Can we ball bounce there?
Jimmy: This is an anything goes masterbasium, we can do whatever we want aslong as we beat off while we're doing it.
Mackie: Oh My God! Sounds wonderful! Let's go!

Masterbasium by Spudike June 5, 2018

masterbatum

when someone offers you a choice between two things and you decline both and decide to masterbate instead

joey:listen man, you can either come with me to the grocery store or go make your own dinner, your choice.

penisface92: fuck you man, im about turn that ultimatum into a masterbatum.

joey:fine asshole, do what you want, youre never gonna get a girlfriend.

masterbatum by penisface92 September 17, 2011

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