treebang Share definition Flag The act of having sex in a tree. Multiple splinters.. Maybe a sprained wrist, but worth it. "Man I treebanged Sarah so hard last night! I may or may not have a splinter in my ass.." treebang by Donniefloorin March 10, 2014 0 0 Get merch Get the treebang mug. Buy Now — $32.95 See more merch