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 2, 2006
Get the braindigger mug.
A person who talks to another person only to get help on homework.
That braindigger asked for my homework again.
by enersion February 3, 2009
Get the braindigger mug.