nighty-night

[ nahy-tee-nahyt ]

interjectionInformal.

Origin of nighty-night

1
1875–80; reduplication of (good) night;see -y2

Words Nearby nighty-night

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use nighty-night in a sentence

  • If you're a good boy, maybe I'll kiss you when we say nighty-night.

    Babbitt | Sinclair Lewis