Top Definition
A synthesis of masturbate and auditorium. Refers specifically to a young man's messy room - his headquarters. Significant masturbatory activities occur within the mastorium; a cum dungeon.
Kun Snr: "Hi Kun, what are you up to?"

Middle Kun: "Just cleaning up my mastorium!"
#masturbate #bedroom #cum #dungeon #man pad
by kooneyman June 30, 2010
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