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a person that hooks up/marries someone for their knowledge
(see golddigger)
Since Kevin is very smart, everyone that goes out with him is a braindigger.
by Yukon Wang April 01, 2006
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One who shows interest in a person for their superfluous intelligence. Now, that alone may sound positive. This, however, is not the case as brain diggers would only like to use the brainpower for their own selfish needs.
1.Girl 1: You are such a brain digger.
Girl 2: What? Why!?
Girl 1: You only make friends with the smart people so you don't have to think of stuff on your own.
Girl 2: I'm sorry!
by smiles327 August 12, 2009
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One who goes on and on talking about a topic or insisting something despite the reluctant listener. This term can be loosely used for many varying usages.
Example A: Spok, I've heard about your new car a thousand times. Stop digging my brain.

Example B: Uhura doesn't stop nagging me to go to the doctor, what a brain digger.

Example C: I was at Chekov's party yesterday, and there was this brain digger there that didn't stop talking to me. Eventually I just left.
by Laika the space Dog December 05, 2009
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Someone who gets men for their brains. Similar to golddigger. Often nerdy.
1: Damn that bitch brain digger diggin' Bill Gates for his brains. She gold diggin' him too.\
2: Tru dat.
by The Big Changsta April 12, 2006
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