In an effort to show that they had put on a 'new' personality, many who joined the WTBTS would adjust their speech patterns to avoid common expressions of cursing or profanity. Yet there would still arise times when they would become frustrated, angry or disgusted at someone or at a situation, and wish to express their feelings. Here are a couple of substitutes for cursing heard among JWs .....
Forget You.
Dumas (pronounced like a proper name). Useage: "Don't be such a Dumas".
Rectal Orfice. Useage: "That householder was such a rectal orfice".
Any more?