This week’s word is backdoor. From a poker perspective, backdoor means hitting the two cards you need to make your hand on the turn and the river.
For example, say you have two spades in your hand and there was one on the flop. If two more spades show up on the turn and river then you’ve made a backdoor flush.
Similarly, if you have three cards to a straight between your hole cards and the flop—and the turn and river cards complete your straight—then you’ve made a backdoor straight.