Something, usually a situation, that you can get into that can have very persistent effects much like stepping into "dogshit". Scrapping the soles of your shoes for days trying to
get all the
nasty, shit-smelling turdbits off your
fancy running shoes is not fun.
Joe saw the "dogshit" and got out of that shithole bar before all hell broke loose.
Jim knew that
Jill was "dogshit" crazy and might fucking kill him with a butcher knife, so he kept a safe distance away from her
vagina area.