Crackpot (noun)

A person who holds eccentric or lunatic views.

Origin:

Crackpot is a word that originated in the early 20th century and is thought to come from the phrase "cracked pot," which refers to something that is broken or damaged.

Examples:

1. He is a crackpot, who thinks he can control the weather.
2. The group's leader was a crackpot with a vendetta against the government.
3. He was labeled as a crackpot by his colleagues for proposing such a radical theory.
4. The old man's ramblings were dismissed as the ravings of a crackpot.
5. It"s hard to take the crackpot"s ideas seriously.