‘Cowashing’ (‘cowash’) is the process of using a conditioner, instead of shampoo, to help rinse away buildup and improve the moisture retention of your hair.
Many shampoos usually strip the hair of not only build-up, but all helpful oils which will keep the curls lubricated and soft. So its called ‘cowash’ because you’re using a COnditioner to “WASH” the hair.
Typically washing the hair means using some type of shampoo or surfactant to remove the dirt. So don’t be thrown off the name.