An incredible success so fantastic that long poems would be written about it in the future.

A win so great,so awesome that it is EPIC.
May also be used to describe something very nice and enjoyed.

A win or victory of some nature which falls in the following categories
-An overwhelming Victory over an opponent
-A victory thats been snatched from the jaws of defeat
-An unexpected victory from an underdog
-Something fantastic thats happened or worked out unexpectably well

The greatest possible way for man to succeed ay anything.

Contradictory to Epic Fail

What you shout while on Amphetamines.

Adj. Something or someone that is amazing or 'win';

Adj. -An expression of happiness and/or elation and/or awe at an event that has taken place.