A veteran move to say the least. Often used after a long night of alcohol consumption. When a gentleman's erection is non-existent, he places his index finger under his limp noodle to "splint" it in order to succesfully guide it into his partners vagina in hope that once inside, he will wake up and perform.
"Man I was so wasted last night that I had to go with the finger splint. Even then I couldn't get it up! Needless to say, I was embarassed.....but not as much as she was!"