eatschin Share definition Flag When a girl is being eaten out while in the act of taking a shit. Similar to a blumpkin, but the act is being done on the girl. Damn, that girl is given the other girl an eatschin! eatschin by chris@msu October 12, 2009 0 0 Get merch Get the eatschin mug. Buy Now — $32.95 See more merch