Phrase for a Complete, Over the Top Mistake

This page is the CodyCross answer for the clue below from Brazilian Tour, Group 761, Puzzle 3 (Ipanema Beach).

Question is: Phrase for a Complete, Over the Top Mistake

and the answer is: EPICFAIL

Word Meaning:

EPIC FAIL — (Internet slang, originally 4chan slang) An utter failure, especially where success should have been reasonably expected.

Definitions from Wiktionary.