A sexual act in which one partner, while performing cunnilingus, adjusts such that the upper lip rests on the women's labia, while the lower lip rests on her anus. the taint is placed in between the lips and 'gummed on', like an old women eating a huge rubber cock.
'Dude, i got smacked with a flashlight while giving my girl droppsies in the car... when i came to, i realized i was giving her the ol' charleston chew.... bitches.
'My girl queefed and farted at the same time. yeah. it was sick. but man, what was worse is that i was giving her a charleston chew when it happened. i wish i was dead.'