There will never be another s— deal at Goldman Sachs Group Inc.

The New York company is telling employees that they will no longer be able to get away with profanity in electronic messages. That means all 34,000 traders, investment bankers and other Goldman employees must restrain themselves from using a vast vocabulary of oft-used dirty words on Wall Street, including the six-letter expletive that came back to haunt the company at a Senate hearing in April.

"[B]oy,...