Rubboard

The traditional laundry washboard, also referred to as a rub board, was sometimes hung from the neck by string and has evolved into a worn corrugated vest. The vest is known as a rubboard or, in Cajun French, a frottoir. Both are played with scratchers of the musician's choice, such as bottle openers, sewing thimbles, and gloves with metal objects glued to the fingers. The simple washboard is often played in jug bands while the frottoir and the accordion are staples of Zydeco.