Opposite of black out. When you regain consciousness while you’re body is still doing something after a hard drinking session. Examples include finding yourself wandering by a dual carriageway at 5am, orf finding yourself snogging someone with no idea how you got onto intimate terms with them.
Hypothesis: Very much like your body’s own version of Douglas Adams’ peril sensitive sunglasses. Something that switches off your conscious mind while your body keeps doing things. Ideally would stop you getting into too much trouble. Depends who you’re snogging though I guess.