What French phrase meaning 'Let the good times roll' is associated with Mardi Gras?

The French phrase meaning “Let the good times roll” associated with Mardi Gras is “Laissez les bons temps rouler.”

It is a Louisiana French expression, especially familiar in New Orleans and along the Gulf Coast. The wording is essentially a word-for-word translation of the English expression “let the good times roll,” and it captures the festive spirit of Carnival before Lent.

The phrase is strongly linked with Mardi Gras tourism, music, parade culture, and Louisiana identity. However, it is not standard metropolitan French: “Laissez les bons temps rouler” reflects Louisiana French usage. A closely related variant, “Laissez le bon temps rouler,” also appears, but the plural form stored here is the best-known Mardi Gras version.

Mardi Gras itself is French for “Fat Tuesday,” the final day before Ash Wednesday. New Orleans celebrations extend across Carnival season, with parades, masked balls, costumes, music, and throws such as beads and doubloons.