Dousch is a common misspelling of douche. A douche is a method of rinsing or cleaning out the vagina by squirting water or other solutions. See Tweets about # dousch on Twitter. See what people are saying and join the conversation. dousch bag definition. 1. a bag for v*g*n*l discharge at the end of the day 2. a complete f*g 3. something you jokingly call your friend when he/she is being.