The cutest couple on the planet. Other couples are often jealous of their relationship and this often manifests itself as hatred of Travella.
Person 1: Aw, there goes Travella walking down the sidewalk, holding hands! How adorable!
Person 2: I agree! But wait! Who are those two other gross "people" following them?
Person 1: I'm not entirely sure, but based on the general hatred in their eyes, I'm guessing that they are jealous of Travella.
Person 2: Oh, that must be Mewman. It's pretty sad how bad they have Travella envy.