The same concept as dingle-berries. Crusty pieces of turd that dried on your stanky ass hair in lil precious nugs. People specifically in Parma, OH - try to collect as many as possible as delicious ass treats when tossing salad (licking a butthole for sexual pleasure) is a delicacy - highly popular amongst the, booty boy butt hoes.
Todd: Hey Chad, I heard you've been saving those crusty butt nuggets especially for me. Can't wait to taste those delicious salad toppings tonight.
Any unwanted chunky debris hanging within the recess of one's butt. Butt nuggets normally require a concentrated effort in order to remove them, such as but no limited to: heavy wiping with toilet paper, or hot water and soap.
I took a dumplast night, I was ½ a slee,and I did not get my ass completely clean, and this morning I scratched my ass and felt debris in my pubic hairs on my rectum.
The little "butt nugget" across the street kept coming over to my car when I would drive up wanting to show me his new "cool" bike. (The kid was all of 6 years old, a pest and dorky!)