The Cloonchas is the area of Cloonbonnive and Gortaganny in West Roscommon where most townlands begin with 'Cloon', eg. Cloonfower, Clooncan. From the Irish for meadows, 'Cluainte'.
To express delight that something went awfully wrong for someone (they might have had it coming to them or deserved it in someway, or you might dislike them). For example if an insult they used backfired.