nigbutt Share definition Flag Similar to Mudbutt, but it's not as runny. "Man, I had to crap so bad last night, I pinched one off too soon and had Nigbutt for hours before I found a bathroom" nigbutt by Clayton Biggzbee September 14, 2007 0 0 Get merch Get the nigbutt mug. Buy Now — $32.95 See more merch