Short for "butterflies in vagina."
Used to describe the feeling women get when their partner does or says something non-physical that still arouses them.
Similar to "emotional erection"
He calls every night to read to her until she falls asleep. She now gets biv every time he calls.
A man, a myth. A gentleman, and a scholar. Known to perform random inch worms when intoxicated. Known to do pretty much anything when intoxicated if you say “you won’t”. Friend or foe. Stay clear or stay near. Kinda like Batman.