someone or something that one despises.
“Y’know what? You and our little shit-critter can leave whenever you want…” from the movie "Tideland"
by jadedemotions October 13, 2007
The girl that works night shift and leaves her shit in your work area or a little animal that steals your turds and stores them up for the winter.
That shitcritter Kim left her shit all over my glass!
by EMOW August 17, 2006