Cockamamie (adjective)

Fanciful, absurd, or nonsensical; implausible or impossible to believe.

Origin:

This word is of uncertain origin, but it is believed to have originated in american english in the early 20th century. it may have been influenced by the phrase "cockamaroo," which was used in the 19th century to describe something that was showy or spectacular but lacking in substance.

Examples:

1. The movie"s plot was so cockamamie that I couldn"t even follow it.
2. He came up with a cockamamie excuse for why he was late.
3. Her cockamamie plan to save the company was met with skepticism.
4. The idea that aliens built the pyramids is a cockamamie theory.
5. His cockamamie invention never really took off.