Definition of Loony

a crazy person

Examples of Loony in a sentence

Aunt Hannah is often considered the family loony, as she is constantly rambling on about alien abductions and government conspiracies.  🔊

The term ‘loony bin’ comes from the fact that asylums were once used to contain individuals that had been labeled as crazy or insane.  🔊

Oscar is a loony who thinks the Earth is flat and the government faked the Moon landing, but at least he’s a nice guy.  🔊

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