Session involving intoxication on one or all of the following drugs; Ecstasy Speed/Amphetamines Magic Mushrooms, LSD, Ketamine, Poppers or Cocaine, usually in combination with copious quantities of alcohol. This could take place in a house, club, or squat/ squat party
People at munt-fests commonly display symptoms of sweating, gnawing of the inside of the cheeks, gurning (often without realising it), inability to focus, barely capable/ incapable of stringing a coherent sentence together. Can also involve baying at a strobe for hours on end.
Squat parties are invariably munt-fests. So is the Slimelight club in Islington.