Seahater Share definition Flag An uneducated, primitive human being whose homerism & trust in Skip Bayless block a healthy respect for the Seahawks & 12th Man. 9ers fan: "Seahawks ain't SH**!" 12: "Seahater." Seahater by _u_mad_bro May 19, 2013 0 0 Get merch Get the Seahater mug. Buy Now — $32.95 See more merch