Dutch word for a seed that grows on oak trees, slang for the head of a mans dick
Shut the fuck up eikel
Dutch word for acorn. Also used to describe the head of a man's penis, but most commonly used to insult a man.
When used as an insult the most literal English translation for eikel would be 'dickhead' and is used in pretty much the same way.
My boss is an eikel (mijn baas is een eikel)