9 volt battery 

1 A power source.

2 A simile for your girlfriend's brown eye.

Your girlfriend's ring-piece is like a 9 volt battery. You spend too long looking at it and you're going to want to stick your tongue on it.

9 volt battery by RoryGalway February 12, 2010

9 Volt Battery 

While licking an asshole the recitient issues a small fart resembling the tingle you get from a 9v battery

i started licking this chick's asshole and she gave me the 9 Volt Battery! WTF!!!

9 Volt Battery by Lucky Lucifer August 22, 2011