Short attitude phrases like this spread on soundboards and short form video because they sum up a whole personality in a few words. Fat sassy and spoiled became a go to label for pets who rule the house, characters with diva energy, and anyone proudly owning a pampered lifestyle. Creators reuse it as a punchline over unrelated footage, turning ordinary moments into character introductions. Its brevity keeps it loopable, which helps it survive beyond a single trend and stay useful for reaction edits, pet compilations and comedic reveals.