The act of mashing blueberries in your hand and vigorously masturbating to climax in a matter of 3-6 strokes, closing your eyes, and dumping your load onto a pile of tundra lichens.
After a long jet boat ride staring at the golden locks of a prestigious doctor's daughter Eric excused himself, gathered some blueberries in his hands, mashed them up and executed the the “tundra jerk” with extraordinary accuracy.