>>52139240It's literally "ultramegacool", but not cool like modern cool, cool as in "tubular" or "radical", which is to say absolutely no real person outside of tv has ever said it unironically. Klara is basically saying "the super duper, smokin' sexy stylish, ultramegacoolio, [literal nonsense that just means "cool" in toddler-tier rhymes] thing?!"
Also I take the bait and say kys for calling spanish latinX, and double fuck you for using latinX at all and not latino or latin american.
