This sexual postion requires 4 particapants. 2 male and 2 female or 4 female. The act requires the two females to be making out while the other 2 participants perform the rusty banjo
on the females. For best results perform during the dueling banjo scene of the movie Deliverence. Hence the name.
Anne-Marie and Jody were so horny they wanted Lyall and Travis to perform the Deliverance on them.