A tree hugger is a a temporary discomfort of the male genitalia which occurs when one's moist scrotum "wraps" itself around the less moist shaft of the penis, providing a keen grip. In doing so, the testicals separate from one another and are displaced by the penis. This displacement causes significant tension on the sides of the shaft, as if the testicals were "hugging" the penis.

So in other words, it's when your sweaty balls wrap around your cock, it's not cool.

An Enviornmentalist

An environmentalist or one who believes trees and all living things should not be cut down or harmed. Someone who works to protect the environment from destruction or pollution.

a tree hugger is someone who cares about the only thing in the world that gives us oxygen...they want to save trees from people that dont recognize the importance of them.

Individual that plants trees and will not cut them down where they are not indigenous, especially in Western United States. This results in disastrous forest fires that, ironically, burns down the tree huggers home. Enraged by this, tree hugger then torches large SUV's in car lots, releasing incredible amounts of toxins into the atmosphere. Can usually be found in upscale coffee bars and protesting at world economic summits.

A Enviornmentalist AKA Hippie

a stalker

The act of a male sticking his branch up a female's woodpecker hole, and then rubbing his sap all over her face. Then waiting until the sap dries, to let the golden shower wash it away.