Flanderization: Coined from the character Ned Flanders from The Simpsons, refers to a character’s traits becoming their defining aspect, resulting in a one-dimensional character. This can happen over time in long-running shows, with a character’s initial quirks becoming exaggerated and dominating their personality.

At first, it just seems like some little quirk, maybe. You joke about it. “Teehee, he/she is proud and just doesn’t like to be wrong!”

After years, though, you realize it’s “they literally cannot perceive themselves as wrong, ever.” Which means any behavior can be excused or waved away. Fast-forward a generation or two down the line and, left unaddressed, you can have generations worth of people left defending outrageous abuse, etc… that stemmed from one little silly “quirk” people initially joked about, but eventually became all-consuming.