Watertight
Similar to Spitroast, Watertight is essentially the same, but with one woman, and three men. I.e. the orifices mouth, vagina and anus are filled.
Boy, we really made Melody watertight.
watertight
Someone who does not leak information.
"It's OK, you can tell me, I'm watertight."
do frogs have watertight assholes?
An answer to any question which is obviously yes.
Dude: Are you shitfaced?
Guy: Do frogs have watertight assholes?
Guy: Do frogs have watertight assholes?