"Mora na maidine dhuit" (Top of the morning to you); "Sláinte" (Cheers), from one of the only non alcohol consuming pure Irishmen on the planet.
If someone attempts to ruin you day today, simply tell the, "Go n-ithe an cat thú is go n-ithe an diabhal an cat". (May the cat eat you, and may the cat be eaten by the devil.)
Eat, drink (whatever) and be merry mates !!!