ghetto ear
A trait developed when one has lived in the ghetto for an extended amount of time. It allows the listener to distinguish between certain characteristics of the area - such as a gun shot.
*bang bang*
Person #1: Gun shots!
Person #2: How did you know that?
Person #1: Ghetto ear.
Person #1: Gun shots!
Person #2: How did you know that?
Person #1: Ghetto ear.