Look at that fucking plonker!
I stuck my big fat plonker up her arse!
by KL June 27, 2003
Get the plonker mug.
a poo that is so heavy that makes a massive splash with the toilet water that hits your arse and makes you feel wet.
aw man i just took a massive plonker!
by 56413257658374211453 August 27, 2007
Get the plonker mug.
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
Get the plonker mug.
A game similar to conkers that involves two men and their genitalia.

Each man takes it in turn to whack the opponents balls with their penis. The receiver must ensure that their penis is held firmly up and out of the firing line so as not to interfear with a clean whack. This is repeated until the lesser man concedes defeat and the dispute is settled.
"Man i think your girlfriends hot; I'll give you a game of plonkers for her"
by TheGayMaker December 14, 2007
Get the plonkers mug.
A polite, in mixed company, and alternative word for stupid cunt and wanker.
John is a plonker.
by Dick Splash August 17, 2003
Get the plonker mug.
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 Alexis_J_M August 25, 2005
Get the plonker mug.
Nursery word for poos, after the 'plonk' they make when they hit the water.
Oh look, you forgot to flush the toilet and it's full of plonkers!
by David from Kingsbury January 19, 2006
Get the plonkers mug.