The word of the day is dimpling.
In particular, Apple Dimpling.
This is an action word (ie. verb). It is the act of creating dimples. Apple, in this case, is an adverb. Dimpling is the verb.
Some of us were born with dimples, but a surprising majority were not. No fear, though, for apples are near.
Kids roam the streets of America, hurling apples at unsuspecting friends and foes alike. When they strike the face, in particular the cheek (a rather cheeky thing to do, if I say so myself!), they sometimes leave a depression, a lasting depression right there on the surface of the skin, near the edges of one's mouth. Thus is born, the apple dimple.
The kids who roam the streets in packs, hurling apples? They are called apple dimpling gangs (I think there may have been a Disney movie at some point about them).