Was at a friend's party/get together thing, and this friend of her younger sister's showed up. She's a college freshman, very skinny brunette, and was wearing a crop top and loose green and purple pajama pants. They were pretty loose in the back, and very quickly the top of her seamless blue panties were showing. They had a bit of a wavy design, which made me think they were lace at first, but the waistband just looked lacy, I could tell it was seamless. I assumed it may be normal panties, as she was dressed comfortably, but after only a few minutes at the party, she reached behind her, grabbed her panties through her pajama pants, and picked her wedgie. Since she grabbed the fabric so high up, it was 100% a thong. I love being able to tell when a girl is picking a thong wedgie through her pants. Instead of grabbing the bottom of some normal panties, they have no choice but to grab the top of string that's going into their ass and yanking outward. She continued to do this 4 or 5 more times that I saw throughout the night, maybe she was also down to an uncomfortable pair.