Shleerb Share definition Flag A word used to describe a gnarly barrel, generally below sea level. If surfed incorrectly this type of wave will split your anus. "check out Thomo he just got the sickest shleerb!" Shleerb by Mellow Goods December 5, 2018 0 0 Get merch Get the Shleerb mug. Buy Now — $32.95 See more merch