What does "kill a tree" mean?

Taking a piss in the outdoors. Urinating on a tree, grass, or anywhere, outdoors.

Definition

Taking a piss in the outdoors. Urinating on a tree, grass, or anywhere, outdoors.

Noteworthy: Many fetishes, involve urine, or the public urination aspect of one's normal bodily function. BDSM aficionados have an entire sub culture that involves the bladder, and urine. Part of the control aspect, found in some BDSM role playing, or sex sessions.

About

See also watersports.