crackpot
[noun]
Synonyms: crackbrain, crank, cuckoo, ding-a-ling, harebrain, kook, lunatic, nut, screwball

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Related Words: case, character, dingbat, eccentric, oddball, oddity, wack, loon, loony, madman, maniac

[TahlilGaran] English Synonym Dictionary ▲

crack‧pot /ˈkrækpɒt $ -pɑːt/ noun [countable]
[Date: 1800-1900; Origin: crack + pot 'head']
someone who is slightly crazy
—crackpot adjective:
crackpot schemes

[TahlilGaran] Dictionary of Contemporary English ▲

crackpot
an eccentric person with ideas that do not make sense to others
The man is a crackpot and you never know what he will do next.

[TahlilGaran] English Idioms Dictionary ▲

crackpot
n., attrib. adj., informal
1. n. An eccentric person with ideas that don't make sense to most other people.
Don't believe what Uncle Noam tells you
■ he is a crackpot.
2. attrib. adj.
That's a crackpot idea.

[TahlilGaran] English Idioms Dictionary ▲