Subverted: Bob slowly smiles, and it seems to be heading into the uncanny valley, but becomes cute smile.
Double Subverted: ...Then it keeps going into creepiness.
Parodied: Bob's smile is so horrible to look at that every adult around him loses bladder control, while all infants and children in the nearby area starts to cry.
Zig Zagged: Bob's smiles can either be this or When She Smiles, often without rhyme or reason.
Averted: Bob's smile is in no way creepy.
Enforced: When the actor playing Bob smiles, it really does look creepy, and he'd need a plastic surgeon, an orthodontist, and a specialized facial expression coach to change that. So instead, Bob's creepy smile is just thrown in as a genuine character trait.
Lampshaded: "Is that a smile or did you lose a fight with a weed whacker?"
Invoked: "We want to use Stoic Bob in a joke. I wonder how..."
Exploited: The Five-Man Band uses Bob's creepy smile to distract a guard so they can sneak in somewhere.
Defied: Bob just smiles.
Deconstructed: Bob was in a horrible accident years ago, and the facial nerves and muscles didn't heal right.
Reconstructed: There is nothing that Bob wants to smile about anyway.
Go back to The Unsmile, and seriously, stop smiling. You're creeping everyone out.