Someone who acts idiotic, neglectful or like a piece of shit flopping from a wall to the ground.
Fred! Quit acting like a flapdrol.
Plural: Flapdrollen
Dutch insult, literally translates into 'flap turd'.
'Flap' refers to the sound of a wet object falling to the ground, and 'turd' refers to animal excrement.
English person: "Dutch people are drunks"
Dutch person: "English people are flapdrollen"
English person: "...What?"