butt raisin 

That unfortunate small bit of poo that gets stuck in your crack. It's missed in the general wipe/cleansing process but ultimately is discovered due to it's odor.

Sometimes the only poo that comes out when constipated, little bits.

I'm so constipated all I can pass is butt raisins.

butt raisin by Southern Cook again January 16, 2009

raisin butt 

The act of extensively clenching one's butt cheeks forcefully together until the point where the skin of the gluteus maximus dimples, forming what looks like a wrinkled raisin. Must be done without the use of hands or assistance from others.

Anna successfully avoided anal penetration at the party by doing raisin butt.

raisin butt by pfdjkbuer8k December 13, 2016

Butt Raisins 

Fine clusters of excrement that have solidified on the ends of pubic hairs in the rectal region.

Also double as excellent munitions.

Andrè plucked a butt raisin from the crusty rim of his anus, flicking it nonchalantly at the other people on the bus.

Butt Raisins by Professor Rape PhD July 28, 2003

Butt raisins 

The small, stubborn slivers of shit that come out of your ass after you're finished with a dump. Nothing comes out unless you strain every muscle in your ass for 20 minutes until you finally release the butt raisins.

Man, my asshole is empty, but those butt raisins really put a toll on me *huff* huff*

Butt raisins by Bob Brown December 2, 2007