The "three-high" is a term used in the context of poker, specifically referring to a hand that contains three cards of the same rank. For example, if a player has three kings in their hand, they are said to have a three-high. This hand can be a strong contender in various poker games, depending on the other cards in play. In Texas Hold'em, a three-high can be formed using the player's hole cards and the community cards. The strength of a three-high hand is determined by the rank of the three cards and the potential to improve with additional cards.