Definitions by Bug nut Ronface

Epic Fail 

During the act of sexual intercorse where something doesn't go right, e.g. inability to ejaculate.

also used in internet games (such as counter-strike) when you die epically.

Antonym: Epic Win

Judy: Hey, why aren't you ejaculating?
Jeff: I can't...
Judy: Epic Fail!
(probably not how it would come about)

Epic Fail by Bug nut Ronface August 20, 2009