clumpkin Share definition Flag 1. To perform oral sex on a girl while she's passing a bowel movement. 2. Eat out a girl while she's taking a shit. 3. see blumpkin Yea, my girlfriend got a promotion at work so I gave her a congratulatory clumpkin. clumpkin by Justus Balentine January 4, 2007 0 0 Get merch Get the clumpkin mug. Buy Now — $32.95 See more merch