This is a slang expression that can often be heard in real casinos. This practice is common in most institutions.
Bury Cards – remove the top card in the middle of the deck without opening it before the player.
This technique is used in casinos to deal with cheats, who mark or peep cards. It can also be used in the case of the dealer's mistakes if he accidentally opened the card or incorrectly dealt it.
In addition, dealers bury or burn cards to prevent professional players from counting cards in blackjack and some others gambling.