What is Huck Finn?
When a man penetrates a woman anally while immersing her head in a toilet bowl full of his fesces.
"You wanna Huck Finn tonight?"
"Your shitter or mine?"
"You wanna Huck Finn with me tonight?"
"No, didn't you eat beans today?"
The sexual act of fingering one's asshole, whilest holding a fishing hook in the other hand.
David: Can we Huck Finn?
Lindsay: I don't want to be Huck Finn'd, I'm afraid of fishing hooks!