Nutster

Someone who busts his nuts a lot, fapping a lot. Someone who uses a lot of time on the toilet fapping, could be considerd a nutster.

brothers: why do you use so much time on the toilet?
Nathaniel: I'm watching youtube, beacause I get bored.
brothers: nah you're definitly busting your nuts in there.
Nathaniel: no i am not, i am watching youtube
brothers: NUTSTER!NUTSTER!NUTSTER!NUTSTER!NUTSTER!NUTSTER!
Nathaniel: whaaaaaaa ;(