The Karsten Share definition Flag A form of masturbation where as soon as you cum you catch every single bit in the air with your other hand. "Aww man my hand is nasty, I did the Karsten a couple of minutes ago." The Karsten by Lea Andries November 29, 2019 0 0 Get merch Get the The Karsten mug. Buy Now — $32.95 See more merch