The 2004 Taboo Tuesday was the inaugural Taboo Tuesday/Cyber Sunday professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It was held exclusively for wrestlers from the promotion's Raw brand division. The event took place on October 19, 2004, at the Bradley Center in Milwaukee, Wisconsin. It marked the first time in which the fans were given the chance to vote on stipulations for the matches. The voting for the event started on October 18, 2004, and ended during the event. In 2006, the event was moved to the traditional Sunday nights for PPVs and was renamed to Cyber Sunday.

Eight professional wrestling matches were featured on the event's card. The main event was a steel cage match in which Randy Orton defeated Ric Flair by pinfall; this marked the only time Flair ever headlined a WWE pay-per-view event. Two bouts were featured on the undercard. In respective singles matches, World Heavyweight Champion Triple H defeated Shawn Michaels to retain his title and Gene Snitsky defeated Kane in a Weapon of Choice match.

Taboo Tuesday grossed over $215,000 in ticket sales from an attendance of 3,500 and received 174,000 pay-per-view buys. This event helped WWE increase its pay-per-view revenue by $6.2m compared to the previous year. When the event was released on DVD, it reached a peak position of seventh on Billboard's DVD Sales Chart.