cranking the birch tree Share definition Flag Slang for male masturbation, originated in Hanson, Massachusetts. I walked in the locker room and there was Ben cranking the birch tree to no avail. cranking the birch tree by SlapStickSlappy May 9, 2009 0 0 Get merch Get the cranking the birch tree mug. Buy Now — $32.95 See more merch
