Chris Tucker says he's been celibate for more than three years and is holding out for marriage ... a revelation he shared during a comedy set in Las Vegas … TMZ has learned. The 'Rush Hour' star made the comments during a performance at The Wynn on Friday, where guests were required to lock up their phones before entering. Sources who attended the show tell TMZ ... Tucker opened up about his love life, telling the crowd, “Well, I'm celibate. I've been celibate for 3 years, but I'm really trying