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.
A face made by a gay guy, usually when taking a photograph, whereas the said gay guy's lips are pooched out in an effort to look like a cracked out model. Possibly inspired by Derek Zoolander's signature pose, Blue Steel.
a failure. The extension to "failure face" is rooted in the school of thought that adding "face" to something makes it stronger or more convincing. See penisface & dickface.
When someone has taken a joke the wrong way and their expression on their face is all you need to confirm this. This can also be applied when due to being in public (e.g. live TV or in front of friends) they can't say they are annoyed but they can't hide it from their facial expression.
Husband - 'You know your that dress looks a bit tight for you darling'
Wife - (Sense of Humour Failure Face) '....'
Husband - 'Is that my phone ringing upstairs... I'm just going to check' (runs away)