The hidden language of poker: Terms every player should master

From *node-lock* to *resulting*, these poker terms reveal the math behind the madness. Why even pros debate the right call—and how you can too.

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2026 January 2 . 1:29 AM

1 min read

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The hidden language of poker: Terms every player should master

Poker has developed a rich vocabulary to describe its finer strategies and concepts. Players and experts use these terms to analyze decisions, solver outputs, and game theory principles. Some phrases, like Alley-oop, even have origins in popular poker discussions.

The term Alley-oop was first introduced by poker experts Ed Miller and Ben Saxton. It appeared in Thinking Poker Podcast episode #285, released in August 2015. The phrase describes a raise that gains extra strength from an unexpected bet made before it.

PokerOrg maintains a glossary of such terms, helping players understand complex ideas. One key concept is Minimum Defence Frequency (MDF), which calculates how often a player must call to make an opponent indifferent between bluffing or folding. Another is indifference in game theory, where two choices yield the same expected value.

Other terms include node-lock, where a solver is forced to take a specific action instead of finding equilibrium. Mixed strategy refers to a solver’s approach that involves multiple choices at a single decision point. Reciprocality explains how theoretical money shifts between players when they handle identical situations differently.

Resulting is a common mistake where players judge decisions based on outcomes rather than logic. Meanwhile, a Mississippi Straddle allows a player to straddle from any position at the table, adding flexibility to betting rounds.

These terms help players refine their strategies and avoid misconceptions. Resources like PokerOrg’s glossary make advanced poker theory more accessible. Understanding them can improve decision-making at the table.