Sorta like a "Strawberry" but instead of a female who has sex or do sexual favors for crack to the dopeman. A bluntberry is female that is for some reason always around when there is weed similar to a strawberry she will exchange favors for a couple hits of your blunt.
Dude 1: Yo T.T. is coming over
Dude 2: Damn that bluntberry is also over here when there is some weed around.
Dude 1: Fuck it... that bluntberry can clean the house all she gonna want to do is smoke and fuck