The principle and/or an unspoken code in which a person performs a task or favor for another person, that results in debt that can only be repaid with anal sex.
Emilia: Thanks for the ride to the bank, but I have no money to pay you.
Winston: If you can't pay me, you are in anal debt to me!
Winston: If you can't pay me, you are in anal debt to me!
by Evan? October 28, 2015