A fork of Rural Dictionary
The act of inserting two fingers into a female orifice to aid in inserting your penis, much like the way a shoe horn is used to put your foot into a shoe.
When I have whiskey dick I use the two finger shoe horn to get my cock into my woman.
Using your finger to get your feet into a pair of dress shoes, when the shoe horn is backwards and you are hammered drunk.
Derek was so hammed his shoe horn was back wards so he had to resort the the double finger horn