Definition of shuffle up and deal
The translation of "shuffle up and deal" is "shuffle the cards and deal them", but you are not likely to hear this phrase often in French. It is a phrase that is often thrown around at the beginning of tournaments. As soon as the tournament starts, the tournament director will shout a "shuffle up and deal" to announce to all the dealers that they can now shuffle up and deal.
Shuffle up and deal as national anthem
If you attend a professional sports game, you may hear someone singing the national anthem before the game starts. It is traditional and customary to do so. In poker (which many consider a sport), the national anthem is not sung, but the famous "shuffle up and deal" is shouted. In many big and prestigious tournaments, it is not the tournament director who will say this phrase, but a celebrity like Doyle Brunson or Bruce Buffer, the official announcer of the UFC.