One of the harshest insults known to man. Is used to describe a chronic masturbator. It is thought that Plang-tok's are usually virgins and wank over the weirdest things imaginable such as 'two girls one cup'
Guy 1) Look at that guy! He's obviously a chronic masturbator.

Guy 2) Fuck yes! Look at how he's walking!

Guy 1) What is that dripping from his pants?!

Guy 2) Dude thats blood! He totally Power Wanks to 'Two girls one cup!'

Guy 3) Hey guys what are you talking about?

Guy 1&2) Fuck off you plang-tok mother fucker!
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