a result of
anal sex, a reverse cakester is the combination of defacation through a
butthole that has recently been ejaculated into, thus creating a chocolate
log coated in semen.
Jim didn't pull out when he stuffed it in
Sally's backdoor, so when she went to "freshen up" afterward she was joined by a lovely reverse cakester as a midnight snack.
cum + poop = reverse cakester