stool stamp
The thong's equivalent to a skid mark.
When there is trace evidence of stool on a thong, and because the thong is so tight, it looks like a stamp instead of a streak.
When there is trace evidence of stool on a thong, and because the thong is so tight, it looks like a stamp instead of a streak.
When she looked at her thong , after she passed gas that was questionable, she noticed that there was a stool stamp.