Pjodder is an Icelandic slang which is originated from the polish name Piotr.
It´s an adjective that friends use to address one another, often taking a bit of a shot at the other person.
You might get called Pjodder if you are saying or doing something stupid but in a funny, friendly, and/or spontaneous way.
There is also the word Pjodd which is an abbreviation for the word Pjodder.
"Beinteinn how was the weekend?"
-It was good, met a lot of Pjodders though."
"Arent fell on his arm yesterday and broke it"
-Hah, what a Pjodder am I right?
"Hey Pjodder are you coming to the game tonight or what?"
-Sure I´ll be there Pjodd.
A proud and loud mother who incorrectly thinks that everyone within earshot (and beyond) wants to hear the "adorable" conversation she is having with her small, "precious" child. Plouders are particularly prevalent on airplanes.
"All I wanted to do is sleep on the plane, but instead I had to hear a plouder talk to her daughter about clouds and other boring shit. I thought about turning around and complaining, but then I would have looked like a total dick."