Dealer Lots refer to a group or collection of cards that are dealt face down to the dealer in blackjack. These cards are not visible to any player and remain hidden until such time as they may be needed, for example when a player requests an additional card after all other players have completed their hands.
The term "dealer's lot" is also used to describe a group of similar items or assets that are owned by the same entity, in this case, the dealer representing the house in blackjack. The phrase can also be used more generally to refer to any collection of things or people that belong together and are managed as a single unit.