hangover

Negative effects, such as headache or nausea, caused by previous drunkenness due to (excessive) consumption of alcohol.

• I really enjoyed yesterday’s party, but now I have the biggest hangover – I’ll not be doing that again any time soon.

Similar negative effects caused by previous excessive consumption of another substance, such as a drug, coffee, sugar, etc.

• Don't go overboard and find yourself with a sugar hangover that lasts for days and makes your diet days that much harder.
• On the other hand, I was already drunk, and wasn't a heroin hangover preferable to the alcohol kind any day of the week?

An unpleasant relic left from prior events.figuratively

• The one hangover from high school that colored part of my college career was the social requirement of having a boyfriend.

A sleeping arrangement, usually in homeless shelters, over a rope.historical

• At the Twopenny Hangover, the lodgers sit in a row on a bench; there is a rope in front of them, and they lean on this as though leaning over a fence. A man, humorously called the valet, cuts the rope at five in the morning.