"cead mile failte," and a wide variety of other spellings. Derived from Gaelic. Esp. in Ireland: a warm welcome; good hospitality. As a greeting, literally, "a hundred thousand welcomes."
There was half a million people there of all denominations The Catholic, the Protestant, the Jew, the Presbyterian Yet no animosity no matter what persuasion, But failte hospitality inducing fresh acquaintance. --"Galway Races," trad., arr. the Pogues, c. 1988