1. Horse manure. Watch out for alley apples on the trail—a lot of people ride horses there.
2. A loose brick or rock found in the street. Look at all these alley apples—when are they going to repave the street?
1. n. a piece of horse manure. (see also road apple.) The route of the parade was littered with alley apples after about twenty minutes.
2. n. a brick or stone found in the rubble of the streets. Kelly kicked an alley apple so that it struck a garbage can with a crash.