Pleasuring one's self to a novel or any form of text that doesn't involve another person. (Not to be confused with sexting)
I spotted an old man mastur-reading in the far corner of the library.
To be a master at doing the Ilan special.
Matthew the Ilan mastur and Gabriel did the Ilan special last night.
A bedroom owned by a single male.
She came into my mastur betroom and turned around.