Definition of "epically"

It is a rare sunny afternoon in an epically miserable London June when the wide South Bank plaza area along the Thames near Waterloo Bridge begins filling with bicycle riders.

2007 November, Todd Balf, “Critical Mess”, in Bicycling

Due to some epically drunk behavior at his sister's Prada fashion thing the weekend before last, he'd somehow cheated on his supremely hot, now ex-girlfriend, […]

2008, Rachel Maude, Poseur: The Good, the Fab and the Ugly‎, Poppy

They stopped discussing them because it usually meant epically dull speeches from Steve on market fluctuations and innovations in Internet trading.

2008, Joe Stretch, Friction, Vintage, page 144

[…] I've been so stupid, so epically stupid and selfish and cruel and …"

2012, Penny Vincenzi, More Than You Know‎, Doubleday