The phrase comes from Spanish-language Simpsons fandom, where short dubbed lines are clipped and shared as standalone reactions separate from full episodes. Pantalones muy cortos circulated on user soundboards as a five second voice clip, often tagged simply with Simpsons and pantalones, without a clear episode credit. Its appeal is its specificity, a complete joke about shorts that needs no setup or context. Like other Homer Simpson sounds passed around in Spanish meme edits, it survives because it can comment on any outfit in seconds.