Beddy-bye is a colloquial term for the act of going to bed or going to sleep. While not commonly used in formal contexts, it is widely used in casual settings, particularly when talking to children. However, there are several synonyms for the word beddy-bye that can be used interchangeably, such as "hit the hay", "catch some Zs", "get some shut-eye", or "go to sleep". Other synonyms include "slumber", "doze", "snooze", and "nod off". These phrases are used to describe the act of falling asleep and can be employed in many different contexts, whether it be children's bedtime stories or discussions about sleep patterns for adults.