plonker 

dope, idiot, moron, wally, pillock, dunderhead, dimwit

You are such a plonker, Rodney.

plonker by Jackson Pillock January 13, 2003

plonker 

the term plonker started out as a reference to someone who was forever drunk on cheap wine (cheap wine is nicknamed plonk) this person was usualy a homeless person, or poor person.

today the term plonker is a very light hearted insult. Its not even seen as an insult, its like calling someone a wally. Its in no way ment maliciously. you call someone a plonker when they say or do something stupid.

bob - why didnt my food cook ?
john - you never turned on the oven, you plonker.

plonker by Emperor Bubba February 1, 2005

Plonker 

A stupid person

Grace!!! You absolute plonker

Plonker by Sugaronastick December 16, 2019

plonker 

a willy! or a dopey person

rodney u plonker!

plonker by deepcoveruk February 3, 2003

Plonker 

A British slang term used as an insult meaning idiot. Usually used in an endearing way or when having a joke with someone

Person: you didn’t have to do that you plonker!

Plonker by Alex.tay09 July 12, 2019

Plonker 

A Plonker is typically some donkey who hangs around alley ways smoking the devils lettuce. He then shags his dad and sucks his toes.

Konrad is such a plonker

Plonker by Turnip———-13 April 30, 2021

Plonker 

someone stupid.

someone who is scared of and gets attacked by squirrels is a plonker.

Plonker by xJess. June 28, 2010