plonkstain 

A person who is a stupid idiot.

You are a plonkstain.

plonkstain by Jonny Jeff Cornwell July 25, 2006

Poonstain 

A particularly heavy flow menstruation.

Sarah had proper poonstain. She was bleeding all over the shop.

Poonstain by mjm303 December 1, 2009

Plonketing

In the act of being a Plonker

Stop Plonketing you Plonker

Plonketing by TheOutsiderz January 27, 2024