1. A term coined by herbologists to describe someone who posseses superior plant-handling skills. 2. Used to describe soeone that didn't fully have sex with a female, but merely masterbated, and yet still got her pregnant.

a big joint the size of a thumb

A word used by gamers to indicate a button layout on an Xbox 360/Xbox controller. In this layout, the primary button (the shoot, punch, or accelerate button) is moved to the "A" key on the controller. Most gamers play this green "A" button with their thumb which started the phrase "green thumb"

It is a approved layout on the halo franchise.

Not to be mistaken for the definition for Green Thumb which means a person with a knack for gardenining.

A term used for a person who has recently bought marijuana or has some on their person.

using one's thumb as a "butt plug"

One who has just eaten a bean sandwich and has to take a massive diarrhea dump but just can't quite make it so one makes a spontaneous decision to stick your thumb up your ass. Works better if shit is green.

a big joint the size of a thumb.