Here's what "Mamou" could refer to:
* A surname: Mamou is a surname of French origin, meaning "a person from Mamou" (a town in Louisiana).
* A city in Louisiana: Mamou is a city in Louisiana, USA.
* A type of music: Mamou is sometimes used as a synonym for Cajun music, as it originates from the Mamou region of Louisiana.
Without further context, it's impossible to give a definitive meaning for "mamou" in English.