Drink induced mayhem.
This term was coined in the UK in the 1980s to describe the activities of 'lager louts'. It was used several times for comic effect in the British television sitcoms Filthy Rich & Catflap and Bottom. The first mention onscreen was in the fifth episode of Filthy Rich & Catflap (starring Nigel Planer, Rik Mayall and Adrian Edmondson), which was broadcast in February 1987. It isn't clear if the writers (Ben Elton, with additional material from Rik Mayall) coined the term or whether they just re-used existing street slang.
The phrase obviously alludes to the earlier term describing shark attacks - feeding frenzy.