The Duff Muttu or the Dubh Muttu, or the Duff Kalli is an art form performed in Kerala by the Muslim community to commemorate their festivals, nuptial ceremonies and also for social entertainment.

Performance— the participants in a Duff Muttu programme sing and dance. The leader sings while the others provide chorus and drum the Duff with their fingers or palms. About half a dozen artists sit or stand facing each other sing, and move in a circular way.