And that's when you shave your lama
Used in reference to the act of pre-coital shaving of David M's mothers pubic areas/regions for the purposes of slander and or a waterpark like vagina. It's just like the Playboy Mansions Grotto but without the bunnies.
Oh man and that's when you shave your Lama! Cause you know you ain't going to be toiling in the swamp waters.