Definitions by Akbar42

blueberry muffin 

It happens every May. You come back from school only to find your female friends from high school getting fatter and fatter. The term blueberry muffin describes a girl who, despite meeting that description, continues to wear the same clothes she did in high school. If you haven't made the connection between the girl and the muffin, take a look at the part of the muffin which flops over the wrapper.
-From Collegehumor.com

Jamie has turned into a blueberry muffin, but I would still cover her in my frosting.

blueberry muffin by Akbar42 August 6, 2004