Any member of an internet message board who is contributing unsolicited and unappreciated posts to another member's thread with the unintended result of "bumping" the thread to the top of the list of threads each time and thereby keeping the thread current and potentially popular.
"Man it really annoys me when he replies to my threads. I wish he'd go bother someone else. Oh well, at least I get bumped to the top everytime he does. He probably doesn't even realize he's my bumpmonkey."
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"