its that look that people make when they get angry or unamused at something, it looks alot like somebody drinking a coffee
i went to discuss the jazz burglars with the treasurer, and all i got was the coffee face
May 14, 2013 Urban Word of the Day
That ugly ass face people have in the morning before they drink their coffee.
Concerned husband: Honey you look awful. Are you coming down with something?
Wife: No, it's just my coffee face. Brew some shit.