Tree Falls in the Woods

When an individual sexually pleasures him/herself in a room (usually a dorm room) with another person in it, but the other person doesn't know. Typically the person that doesn't know is asleep or drunk.

Girl 1: Hey roommate, if a tree falls in the woods but nobody hears it, does it really make a sound?
Girl 2: Bitch don't get all philosophical n shit on me I know you fucked yourself last night.
Girl 1: fml

by Mr.nj April 12, 2016