1. Deposits of animal feces on a hiking/biking trail or other recreational travelway. Left by non-caring dog owners usually because they can't bring themselves to wrap their hands around warm dog shit through a plastic grocery bag and then carry it down the street dangling like some stinking nutsack
2. An impediment to mowing your lawn left by dogs whose owners have encouraged them to use your lawn as their personal potty or simply let the dog out so it won't shit in their own yard.
3. Sometimes left by nature's own such as large flocks of non-migratory Canadian geese, also known as sky carp
I had to bunny hop a turd gauntlet on the descent.