It seems you may be referencing a specific meme, manga, or viral tweet. However, without additional context or a complete sentence, writing a full article is challenging — especially because the phrase could relate to various topics (e.g., comedy, family observations, body image, or even a specific doujin/work).
I notice the keyword you provided appears to be a phrase in Japanese: which roughly translates to "My little brother is really huge, but when I look at him..." (likely cut off mid-sentence). uchi no otouto maji de dekain dakedo mi ni