dirty green

1. Marijuana.

2. A way to speak in code about marijuana when in fact everyone knows exactly what you're talking about.

3. Poorly written code that only a pot-head could come up with.

On phone in a state a paranoia:

Dude #1 - Hey man, do you have any of the dirty green tonight?

Dude #2 - Yeah definitely man, why don't you come by in a half hour.