A person, usually but not always a woman, who dates or otherwise becomes romantically or sexually involved with a man for the sake of obtaining free weed.
My friend isn't a gold digger--she's a weed whacker!! She's seeing this guy because she can get all the weed she wants!
When you continually smack a woman in the face with your dick in a circular motion like a weed whacker. This move is performed after you get done fucking.