The term used to describe when someone makes a supreme ass of themselves as a result of failing at a reasonably simple task. Because an 'epic fail' is such an immense fail, these people are often labled "Fail Whales."
trying to impress his baby son, a dad blew bubbles in his Pepsi through a straw then without warning it erupted into a fizzy lava shooting out of his snout at 1000 miles an hour. Everyone in the restaraunt laughed including a teen who point at him and said "Epic Fail Dude"! laughing he then added "What a total Fail Whale"