It sounds like you’re referencing the Japanese phrase:
Person A: “Your brother is 190 cm and built like a pro wrestler.” Person B: “Uchi no otouto maji de dekain dakedo mi ni kona hot 😎” Translation: “He’s huge, but I’m totally unfazed — hot (lol)” uchi no otouto maji de dekain dakedo mi ni kona hot
: The protagonist, a small-framed boy overwhelmed by his sister's actions. It sounds like you’re referencing the Japanese phrase: