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1.
This is a term to describe a douche bag, a Jakass, or a Bitch

It was invented to be more insulting because a douche bag will clean the pussy, while a plosher will make a dick dirty

It is used so the person it is directed at is even more pissed off then if you just called them a douche or a bitch
That kid looked like a Plosher to me.

You're not even good enough to be called a douche, you're more of a Plosher.

What a little Plosher bitch.
by Serdnom March 08, 2008
 
2.
A complete jackass.
That kid is such a plosher!
by DV- July 08, 2006