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.
1. "Wow. Look at my garden! It's teeming with life!" "Yep. You must have a Green Thumb or something."
2. "So wait. She told you she was pregnant? I thought you said you DID'NT have sex with her?" "Yes Chris. I got her pregnant. Cuz...yaknow...I got that green thumb!"