Now, 'craic' is interpreted as a specifically and quintessentially Irish form of fun. The adoption of the Gaelic spelling has reinforced the sense that this is an independent word (homophone) rather than a separate sense of the original word (polysemy).t first the craic form was uncommon outside of Irish, even in an Irish context. Barney Rush's 1960s song The Crack Was Ninety in the Isle of Man  does not use the Irish-language spelling, neither is it used in Christy Moore 's 1978 version.