A phrase that means you passed out, slept well and undisturbed till you woke up, the exact opposite to how babies sleep.

to sleep infrequently in short spurts and at the most inconvenient times, followed by a big mess in their pants

A metaphor that literally means a person slept peacefully throughout the night.

Most people today do not know how to take care of babies, as a result their child wakes up every 2 hours, pissing and crying and have incorrectly interpreted the meaning of the expression to mean: "Slept like the hell spawn of Satan".

I say hell-spawn of Satan because only Satan could treat a child as badly as these people treat their own children. But fear not children of God, for the age of darkness will only last a short 1000 years.

an expression used to describe when you woke up crying and pissing everywhere

When ABDL, babyfur, DDLG or littles go to sleep wearing a diaper, snuggling plushies, sucking on pacifiers, experiencing peaceful bliss and being adorable

Something someone says as a metaphor, but what they don’t realize is babies wake up crying every 2 hours for food or a diaper change.