When a piece of poop somehow escapes the toilet paper and sticks to an ass hair or two. i.e. dingleberry

Running for exercise and picking up trash you find along the way. It's good for the body, mind, soul, and environment! Started in Sweden but is making its way to the U. S.

pieces of shit stuck in ass hair, that will "knot" come off

when semen gets stuck in your public hair & no matter what you do, it 'will not' come out.

When little clumps of shit get caught in your ass hair, and they WILL NOT come out.

An ex-girlfriend or boyfriend who will knot get lost. Play on words: not/knot. Connotes other meanings of "will knot," lending a derogatory air to the disposed of individual, comparing them to something gross stuck between your ass cheeks.