1. One of those days where you have nothing to do so you spank the monkey many/flick the bean many times!

2. When you try and see how many times you can bash the bishop/tickle the clam before it gets sore.

3. An extra long wank
"Hey, dude. What are you doing today"
"I'm having a masturbarathon, mate!"
by lewis_luther February 14, 2012
A marathon of exclusive masturbation 42.2 hours of pure glorious masturbation
Guy 1- "why didn't you show up to school yesterday?"
Guy 2- " had a hardcore Masturbarathon, my hand and dick feel like fire."
Guy 1- " Dayum I am supah jelly"
by adliebcocko December 13, 2014

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