Gaeliccer Share definition Flag noun. A native of Gaelic countries and or the ethnicity. Often pompous of their and bigoted of others' ethnicity. That Frankie Boyle with his 'woke' comedy is an utter Gaeliccer. Gaeliccer by Euphejism February 18, 2021 0 0 Get merch Get the Gaeliccer mug. Buy Now — $32.95 See more merch