night-night

American  

[nahyt-nahyt, -nahyt, nahyt-nahyt] / ˈnaɪtˈnaɪt, -ˌnaɪt, ˈnaɪtˌnaɪt /

interjection

1. Informal.  good night.

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idioms

1. go night-night,  to go to bed or to sleep.

night-night British  

1. an informal word for good night

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Etymology

Origin of night-night

First recorded in 1895–1900

Example Sentences

After draining his third as the shotclock expired, U.S. teammates mimicked Curry’s famous “night-night” celebration, holding their hands together as if they were sleeping on a pillow.

From Los Angeles Times

Nightbitch puts her foot down with her husband and tells him he’s doing bedtime every night he’s home, to make up for her track record of being the suffering “night-night” parent for two years straight.

From Slate

Also Tuesday, both Biden and his chief rival, Sen. Bernie Sanders, I-Vt., canceled their planned election night-night rallies in Ohio amid coronavirus fears.

From Fox News

“Night-night, Manny,’’ he said to Pacquiao this week at the end of one of the many media sessions.

From Los Angeles Times

The last time I saw you, you said night-night to me and gave me a kiss.

From The Guardian