Noun.
Based on the original Barter System. Used when someone gets injured and they are worried a cast, crutches, stitches ETC will negatively impact their sex life. This is an economically friendly way to get serviced with out resorting to prostitution.
I broke my wrist snow boarding so I used the Barner System to find a guy with an injury fetish.
She was writing the definition of the Barner System and it gave me a boner. Maybe I'll use my boner to service her in return, and consequentially, utilize the Barner System.