1- left over particles of feces lingering at the
bottom of the toilet, nearly unflushable and as fine as silt. 2- Small particles of shit and or toilet paper or other very small pieces of anything lodged in your ass
crack after wiping, usually discovered when washing your ass-
crack during a shower.
"I tried to
flush away the remaining shiticles before my
girlfriend came over, but they just wouldn't dissipate."
"I had shiticles lodged in my ass."
"The shiticles in my underwear ended up staining them."