Definition
The collection of after-effects experienced by a person in the hours following alcohol consumption, persisting even after blood alcohol content has returned to zero. Effects can include headache, dehydration, fatigue, impaired judgment, slowed reaction time, dizziness, and reduced cognitive performance — all of which degrade a pilot's fitness to fly even when no measurable alcohol remains in the body.
Plain English
The lingering physical and mental after-effects of drinking alcohol, which can leave you unfit to fly long after the alcohol itself is gone from your system.
Context Anchor
Seen in aeromedical and alcohol-use guidance, especially when deciding whether a pilot is fit to fly after drinking the night before.
Derivation
From the older English phrase 'to hang over,' meaning something that lingers or remains. The word captures the key idea: the effects hang over the person long after the cause has passed.
Why Pilots Care
Hangover symptoms degrade judgment, reaction time, and coordination even after blood alcohol content returns to zero, creating serious flight safety risks.
Grounding Statement
If alcohol from last night leaves you tired, sick, or mentally slow today, that condition can still make you unsafe to fly.
Intuition Check
Do not think of a hangover as just a headache or inconvenience. In flying, a hangover matters because it can still impair pilot performance after the drinking is over.
Example Sentence 1
Even though it had been more than eight hours since his last drink, the pilot grounded himself because the hangover left him too fatigued and foggy to fly safely.
Example Sentence 2
Even hours after the last drink, a hangover can cause poor concentration during preflight planning.