1) An individual who fails on an epic level, who also happens to contain the word "bar" in their name.
2) A fail that is astonishingly awkward, or is noteworthy primarily due to its awkwardness.
3) To fail particularly hard, to a point that comforting is needed.
1) "Inbar really screwed up last night...definite example of a failbar."
2) "That may have been the most awkward moment I've ever experienced...a total failbar."
3) "Skyler had a failbar so epic, it took every one of us to comfort him."