the morning after (the night before)

idiomPart ofmorning

the morning after (the night before) — idiom

1. the unpleasant physical effects or feelings of regret that a person experiences

1.idiom
Definition

the unpleasant physical effects or feelings of regret that a person experiences the day after drinking too much alcohol or doing something unwise

Example

Theo woke up with a pounding headache and knew it was going to be a rough morning after the night before.

It was definitely a morning after situation when she found her wallet at the bus stop, completely empty.