Boo Boo Chips
After a hefty shit, someone does a 'quick swipe' with the toilet paper leaving a trail of wet, smeared boo boo in one's buttcrack. Once that boo boo dries, the result is that of Boo Boo chips that come out in flakes when touched.
Man, I must not have wiped good today, I went to scratch my ass and got a hand full of boo boo chips!