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1.
Failface is when someone tries to insult you but they fail miserably at it.

Can be used with careface & tryface.
Could be conjugated with the word epic making it epic-failface.
Stop slinging fail cakes around and saying this afterwards. You should probably eat one of those since you're so failface.
by Nicole Careface March 03, 2009
 
2.
the utter epitome of a person who is equivalent to failure.
aka people who sit on facebook chat and argue over who fails more.
Haha do you see that failface over there? They look like Emiko or Omid.
by let's end this March 13, 2011
 
3.
coined by Claudia C. from DTLA, it's a person (mostly a guy) who pretends he's a friend but acts otherwise; a person who does major cock-blocking and tries to isolate you in a group event or away from your friends; a person who seems cool and dateable at first but actually is a stalker in training; a person you should really stay away from.
1. "what happened to that guy you were dating?"

"oh, he turned out to be a total fail face. NEXT!"

2. "omg, fail face is over there. RUUUUUUN!"
by Claudia.Is.Boss July 19, 2009