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lunatic

noun/adjective
/ˈluː.nə.tɪk/

Meaning

A person who is insane or acting in a foolish or reckless way; also used as an adjective meaning insane.

Example Sentences

The driver was driving like a lunatic on the highway.

Example Expressions

drive like a lunatic

Synonyms

madman, maniac, insane, crazy, fool

Antonyms

sane, rational, sensible

Collocations

complete lunatic, act like a lunatic, raving lunatic, lunatic behavior

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