brain sister

An attractive twenty-something year old who is constantly occupied with a Texas Instruments calculator.

"She was a brain sister - texas instruments all day"
-"Brain Sister" by Limozeen

by Daniel C. Johnston July 31, 2006

Brain Sister

A "Brain Sister" is a girl who wears glasses and finished high school. However, there is some debate as to whether or not a "Brain Sister" actually wears glasses.

"She was only twentyseventeen, she was a lonely beauty queen, she was a brain sister, Texas Instruments all day..."

Quoted from the Limozeen song "Brain Sister"

by Garboth March 19, 2008