crackpot

(krakpät′)

noun

Informal a mentally unbalanced or eccentric person

adjective

Informal crazy or eccentric

See crackpot in American Heritage Dictionary 4

noun
An eccentric person, especially one with bizarre ideas.
adjective
Foolish; harebrained: a crackpot notion.

Origin:

Origin: crack(ed)

Origin: + pot1, skull (obsolete)

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