A Kitler is a cat or kitten that bears a strong resemblance to Adolf Hitler. Kitler's typically have a dark coloured or black patch of hair directly below the nose that resembles Hitler's infamous mustache.
Mom: Why don't you take fluffy out to play with the other kittens?
Girl: Idk why mom but fluffy won't play with the other cats, mostly the different coloured ones.
Mom: Well, it's official...Fluffy's a Kitler then.