Plonker 

Plonker:
Person of Little Or No Knowledge and Electrical Retarded

Ever got an Electrical shock because of sheer stupidty,therefore you are a PLONKER

Plonker by Moodygeezer May 27, 2009

Plonker 

To be extremely drunk.

Gerry: Man, you were hammered last night.
Keith: I know, I was outta me bleedin plonker I was!!!! Yeoooww!!!

Plonker by gerbear85 May 29, 2008

Plonker 

1. A person who "plonks" all the time

2. A very lazy person

3. A procrastinator

My boyfriend is such a plonker; he stays in bed all day on weekends.

Plonker by Jack_Mier May 19, 2014

plonker 

Chiefly British: A male paedophile (pedophile) - likes sexual activity with underage boys.

When I was twelve I was walking my bike in the park when this plonker came up to me said I had lovely legs, did I want to go with him. I got on my bike and took off! (This really happened!)

plonker by Michiwawa March 20, 2012

plonker 

an absolute nut case

luke don't, he will kill you, he's a plonker

plonker by andy21224234324 September 7, 2013

Plonker 

A poo poo in your pants

I just took a plonker in the toilet

Plonker by Chickenboii June 10, 2018

Plonker 

When you miss an easy goal in football

You just missed and absolute plonker

Plonker by Chad man March 20, 2019