A type of dildo. The day before, the man will take a shit on his girlfriends chest, then the guy will have sex with his girlfriend. After sex, he will jizz a stripe down the shit on the chest, let it dry, and roll it all up in a long stick. Then, put it in the freezer. The next day, this will be used as a dildo.
Dude 1: Yo, my marriage is failing, any tips?
Dude 2: Yeah, just give her a charleston chew, she will love it
Dude 1: What is it?
Dude 2: (explains)
Dude 1: Dude that's gross, but I like it.