Used in an ironical sense to mean legitimate, and therefore, in reality, spurious and not at all legitimate. Assumes common knowledge of the inherent Simpsons reference.
A method or idealogy of going against the fashionline of "Aber-Crombie" due to their asinine and over priced shitty clothes who's primary goal is to make everyone look like clones, turn suburban youth into mindless zombies by stating that wearing these clothes will make you popular.
Prep: Like, oh my god, I love these jeans cuz all my friends wear them too! Why don't you wear these jeans?
Me: Cuz I am Anti-crombie. Screw what you want me to wear.
Not simply used to refer to a frequently used word as per the use in "a perfectly cromulent word" but may be better defined as germane, or apt, synonomous with appropriate, or fitting.
This defintion suits both uses in The Simpsons' famous episode.
One obsessed or a major fan that of the Abercrombie & Fitch brand.
AKA: aberholic
Friend One: Saranac boot cut jeans? An Upper Cascade striped shirt? A vintage double Ezra prong belt? What a crombieholic.
Friend Two: Dude, I think <I>you're</i> a crombieholic.