When one has feelings to share and takes to Facebook to do so. Instead of writing out what one actually needs to say, they write something cryptic that prompts others to ask "what's wrong." This is usually when the Vaguebooker replies with another Vaguebook reply such as "DM me" or "don't feel like talking about it." This will then prompt the inquirer to not give a shit.
noun: An intentionally vague or one-worded status update, alluding to something else. This could be an inside joke, or anything meant for only a few people. More simply, it could be a plea for someone to comment. Such as "pointless", "frustrated", or any inside joke.
To seek sympathy and/or attention by posting something vague as your Facebook status. Usually the only people who ask you "What's wrong??" are lonely stay-at-home moms who want some extra gossip. The rest of the free world does not give a shit and wish you would just suck it up and shut the fuck up.
VAGUEBOOK POST: "Some people just make me so mad!!"
READERS: "Oh, God...Samantha's Vaguebooking again. I wish she'd shut the fuck up..."