when someone puts their mouth on your scrotum and blows wildly as to make a flagellating sound, much like the "raspberry" you give on someones stomach to cause extreme laughter.
One night my girlfriend was fellating me and out of nowhere she planted her face in my scrotum and gave me a mullberry.
by Jamoca April 30, 2003
by francis July 27, 2006
by gakename999999999 December 01, 2020