Cormac Dempsey Share definition Flag An Irish rock 'n' roll star currently touring the country. Sings and plays the accoustic guitar. I saw Cormac Dempsey last night, he's brilliant. Cormac Dempsey by Mrs B January 11, 2007 0 0 Get merch Get the Cormac Dempsey mug. Buy Now — $32.95 See more merch