beddy-bye

[ bed-ee-bahy ]
/ ˈbɛd iˌbaɪ /

noun

Baby Talk. the act of or time for going to bed or sleeping: One more game and then it's beddy-bye.

Origin of beddy-bye

First recorded in 1905–10; bed + -y2 + (bye)-bye
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019