sack spackle Share definition Flag when a guy wipes his ass back to front, smearing shit on the back of his scrotum Dude, I took a solid beef shit and when I wiped I totally sack spackled myself. sack spackle by Guts February 17, 2007 0 0 Get merch Get the sack spackle mug. Buy Now — $32.95 See more merch