Actually, this *is* called a "stinky face", but it isn't actually because something smells bad.
Its function is to open the vomeronasal, or Jacobson's Organ, located in the roof of the mouth. This allows the full strength of a scent to enter and the testing of chemical scents travelling through the air; from this a cat can read many things... for example, if it finds a scent mark left by another tiger, it can tell WHICH tiger left it and whether or not it's a stranger entering the territory.
I was only trying to explain that the tiger isn't making this face because something TASTES bad. They're not like humans, they don't stick out their tongue and go "Blecch" if they taste something they don't like.
Tiger: Well could kill your owners and u whenever I want soooo *tiger face*
Tiger: "Bleh, you lackin' syle gurrrrrrrrlllllllllllll!!!!!!!!!"