Wiktionary
hole cards
n. (hole card English)
Usage examples of "hole cards".
Crane shouted instantly, flipping over his two hole cards, which were the Ten and the King of Swords, but keeping his palm over the name printed at the bottom of the King, so that only the end of a sword could be seen on the card.
Slowly the Nagus laid down his two hole cards faceup on the table.
Honal asked, scooping in the pot without ever showing his hole cards, since everyone had folded rather than stay in the game.
He glanced at his hole cards, frowned, and shoved them back toward Animal without revealing them.