Mulligan stew is arguably the most discusting sexual manuver you will ever hear of.
It's when you shit inside a vagina and rail her, like your mixing Mulligan stew. DO NOT attempt, infections may occur.
Alex: Yo Bosh Jarker, I heard you gave Jess a Mulligan stew.
Bosh: Naw, man that's gross.
Jess: Ewwww, why would you think of that?