A Plonker is typically some donkey who hangs around alley ways smoking the devils lettuce. He then shags his dad and sucks his toes.
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!
someone who is scared of and gets attacked by squirrels is a plonker.
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!!!!
Plonker:
Person of Little Or No Knowledge and Electrical Retarded
Ever got an Electrical shock because of sheer stupidty,therefore you are a PLONKER
Gerry: Man, you were hammered last night.
Keith: I know, I was outta me bleedin plonker I was!!!! Yeoooww!!!