a hard piece of fecal matter that adheres on the side of the toilet.
by Moshae Music June 07, 2010
1 more definition
The solidification of blood around the anus caused by explosive diarrhea. It is also known to produce a "red halo."
My toilet scab is about to fall off and give me a red halo in my underwear.
by Unstable1 April 08, 2010