Almost any penis, but not a very small one.
A foolish person.
A big wet kiss.
Almost anything that is remarkably big.

Almost certainly most derive from plonker as size, but this in turn possibly from "to plonk", to place with little or no accuracy possibly because it was big and heavy. See also plonka.
"Put your plonker away, Eric."
"Oh Bob, you're such a plonker."
"When I said she looked nice, she gave me a plonker straight on the lips."
"It was the biggest turkey we'd ever had. A real plonker."
"She plonked the meal down in front of me. 'Get stuck in,' she cried."
by R. Clayton Jr November 30, 2005
someone stupid.
someone who is scared of and gets attacked by squirrels is a plonker.
by xJess. June 25, 2010
What you call someone who is so drunk that his head hits the table and makes a loud "Plonk!"
Ingrid is such a plonker! She is smashed out of her mind!
by Boberto the Great November 07, 2007
Someone whose words are not worth reading.
See also plonk.
"Sheesh, what a plonker, I just forwarded all mail from him to the bit bucket.
by Aliza250 August 25, 2005
To be extremely drunk.
Gerry: Man, you were hammered last night.
Keith: I know, I was outta me bleedin plonker I was!!!! Yeoooww!!!
by Ger Bear May 29, 2008
To be so drunk you're unable to remember the meaning of certain words.
Gerry: You were fairly hammered last night.
Keith: I was off me bleedin plonker I was!!!!!!! Yeeoooww!!!!
by Ger Bear May 28, 2008
Person of Little Or No Knowledge and Electrical Retarded
Ever got an Electrical shock because of sheer stupidty,therefore you are a PLONKER
by Moodygeezer May 27, 2009

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.