A dumb pluck - A chicken who thinks they’re smart but can’t tell the differ

A chicken who thinks they’re smart but can’t tell the difference between a sock and a shoe.

My teacher is a dumb pluck. She gave me a D for a math test because I wore a sock on my head.

My brother is a dumb pluck. He thinks he’s a chef because he put ketchup on his cereal.

My pet goldfish is a dumb pluck. It tried to escape the bowl and just swam in circles.