Definitions by SEXY PLAYA

Underground BINGO 

Refering to a sexual action where a bunch of people get together underground and do the 5 letters of bingo

Begin the flirting
Intercourse
Nighttime
G-string must be worn
Orgasim

Monna is often included in this so is moseph

Bryan, and derek engaged in hard "Underground BINGO"

Underground BINGO by SEXY PLAYA August 4, 2008