To blow a snot rocket on a guy/girl's face while they are giving you a blow job and then cum on top of the nasal projectile.
Guy A: Last weekend I totally gave this chick a green gecko.
Guy B: You're fucking foul. I'm never fucking that chick again.
Guy B: You're fucking foul. I'm never fucking that chick again.
by Tabbycat32483 May 13, 2006
Get the Green geckomug.