No, no, not a surly or stubborn pout. I'm thinking super model, here.
You can either have your lips injected with chemicals, or, if you're sane, imagine the camera is a strawberry topped with a swirl of cream (try not to dribble, it will spoil the effect) and then say porridge.
Alternatively, you could make a small haystack (a pout is a small haystack) or (though I am in no way recommending this) shoot partridge or moorfowl.
Thing To Do Today: pout. This word is rather mysterious, but there is a Swedish word puta which meant to be inflated, and a Dutch word pude which meant cushion, and it's probably something to do with those.