Definitions by Dara Davis

Bun 

To poke your fingers into a girl's hair bun where the hair goes into a circle and leaves a hole.
To Bun a person's hair: Bunning.

Guy: Hey, you've got nice hair today.
Girl: Gee, thank-- WTF! STOP BUNNING MY HAIR!

Bun by Dara Davis March 1, 2009