From Longman Dictionary of Contemporary Englishborn-againˈborn-again adjective 1 → born-again Christian2 → born-again non-smoker/vegetarian etc
Examples from the Corpus
born-again• The couple, both born-again Christians, chose the ceremony format, music and minister - understood to be Presbyterian.• After all, fanatic ayatollahs and born-again Christians eager for the Rapture set no encouraging example.• I was ready for born-again Christians or worse.• You must, in short, become a born-again consumer, redeem yourself, and find peace.• But it is pertinent to ask how well he really fits his born-again image.• We do not want to be dictated to by born-again Protestants or doctrinaire Catholics. 