Duck face

[Mark Zuckerberg]

A sad and tragic epidemic hitting young girls all across myspace and facebook
usually found on girls who think they are flirty

[Tina]

A face made by stupid teenage whores on Facebook who think they are hot shit; yet, they are simply attention-seeking cunts. It is ugly, childish, and foolish for a little cunt to put up a duck face picture of herself where she perches her lips together and tilts her head about 30 degrees while taking a picture in her shitty bathroom mirror. Dont do it girls! Youll be a skanky dike slutty whorish bitch-like CUNT!

[Sarah]

Similar to pouting. It is to express double the emotion of a pout, so instead of simply jutting out your bottom lip, you push them both out, making you look like a duck.

[Justin Bieber]

Making ones lips appear to be similar to a puckered anus.