Thin privilege is buying clothes without getting laughed at.
I went shopping at the new forever21 store in my city. It’s a really big store (3 floors). About ½ floor were plus size clothes, what is very much compared to other stores. I spent quite a long time there and every once in a while some thin women came along not realizing that they were plus size section.
Instead of just leaving they started to laugh and giggle about the “ridiculous big fatty clothes” well knowing that I (and other customers as well) could hear them.
In one hour this happened at least four times. Not all of these people were laughing, but they made disgusted faces at least.