Semour Asscrack Share definition Flag a person who really needs to buy a belt because their ass is always hanging out of their pants dude theres a semour asscrack back there, dont turn around whatever you do! Semour Asscrack by becalicious/hates/sara April 13, 2010 0 0 Get merch Get the Semour Asscrack mug. Buy Now — $32.95 See more merch