: "So sexy" is a very common snippet in viral fashion or "get ready with me" (GRWM) posts. For instance, posts involving brands like Victoria's Secret often use this phrasing for product showcases or "top 5" style lists. 3. Niche Discussions
Depending on what you're looking at, it likely refers to one of these: So Sexy.5
If it was a specific social media post or a new song drop, let me know more details! : "So sexy" is a very common snippet