Where everyone goes out on the piss on sunday because the next day is a bank holiday and no one has work.
person1: are you out on super sunday?
person2: ye, right i am, im getting hammered!
person1: i love super sundays
Where a Saturday night drinking/drugs session continues on until late into the next day. Can also be extended on to a Magic Monday, Terrific Tuesday, or Wicked Wednesday.
Ann: Ya on for a stayin' up throwin back a few cans til after da game tomor?
Barry: Aye, why da fook not, last time I had a Super Sunday I was monged.