infowhore (also infwhore)

noun- that kid, likely even your friend who constantly asks personal questions or story-involving questions, and seems more like an "information whore" who will often ask questions like how far you've gone in a relationship, or what happened during that argument between your parents last night- really more interested in finding out things instead of the happy foundations of your friendship.

Very often, infowhores ask questions that have inconveniently long answers that you don't want to remember to tell or put in the effort to share.