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The expression Laissez les bons temps rouler (alternatively Laissez le bon temps rouler, French pronunciation: [lɛse le bɔ̃ tɑ̃ ʁule]) is a Louisiana French phrase. The phrase is a calque of the English phrase "let the good times roll", that is, a word-for-word translation of the English phrase into Louisiana French Creole.
This phrase is often mentioned in Louisiana (especially New Orleans) and around the Gulf Coast where Mardi Gras is celebrated. It is well known touristically around the United States from television and radio.