Fun Charlie

the sexual act of inserting a hot dog weiner into your partner's anus and proceeding to eat it.
A Fun Charlie may also be performed with assorted toppings, such as, but not limited to:
ketchup, mustard, mayonnaise, hot sauce, or relish.

when the hot dog is inserted into a vagina, it is referred to as a "Fun Amy"

Bob performed a Fun Charlie by inserting a hot dog weiner into his girlfriend's butthole, adding some relish and steak sauce, and then gladly devouring the weiner.