Lagoo Bagoo
Someone who's so brainless they believe a chicken can lay a diamond. This word came from Guyana and is now used in Trinidad to curse someone for being the worst.
He's a Lagoo Bagoo. He thinks the sun is just a really bright light bulb.
My friend is a Lagoo Bagoo. He tried to run a marathon in socks.
She's a Lagoo Bagoo. She thinks the sky is a giant piece of paper.