Why Is It Called Roshambo?
The evidence supports the name and its regional use. It does not support a certain origin story.
Roshambo, also spelled Rochambeau or Ro-Sham-Bo, is an alternate name for Rock Paper Scissors used in parts of the United States. The term appears in twentieth-century recreation sources, but its etymology is unresolved. No historical evidence connects the game to the French general Rochambeau, and proposed links to Japanese chants remain hypotheses rather than a documented word history.
Roshambo (also spelled Rochambeau or Ro-Sham-Bo) is another name for Rock Paper Scissors. Same three gestures, same rules, same heartbreak when your rock meets paper. The name is used mainly in the Western United States, and where it came from is one of the game's genuinely unsolved mysteries.
The Name Everyone Uses but Nobody Can Explain
If you grew up on the West Coast of the United States, you probably called it "Roshambo" (also spelled Rochambeau or Ro-Sham-Bo) years before you ever heard the words "Rock Paper Scissors" strung together in that order. It's a perfectly good name. It has three syllables. It's fun to say. And nobody has any idea where it came from.
The term has a real usage history, but published explanations disagree about where it came from. The theories below are labeled as theories because no cited source supplies a documented chain from an earlier word or person to the game name.
Theory 1: The French General (Satisfying but Almost Certainly Wrong)
A popular folk story connects the spelling Rochambeau with Jean-Baptiste Donatien de Vimeur, comte de Rochambeau, the French general who fought in the American Revolution. No contemporary record says that he played, taught, or named this game.
The chronology also works against the story: Western descriptions of the Japanese three-gesture game appear long after Rochambeau’s lifetime. That does not prove how the later nickname formed, but it means the general story should not be presented as history.
Theory 2: A phonetic link to Japanese play calls
Some writers propose that Roshambo developed from an English-speaking attempt to reproduce Japanese play calls such as jan-ken-pon. The similar rhythm makes the idea plausible, but no cited source documents the intermediate forms needed to establish that etymology.
Where Do People Actually Say "Roshambo"?
Published discussions most often associate Roshambo with parts of the western United States, especially California. WRPSA has not found a representative dialect survey that supports a precise boundary or a claim that the term is dominant throughout a whole region.
The "Shoot" Question (While We're Here)
Regional traditions differ on whether players reveal on "Scissors" or on a final "Shoot." The current WRPSA competitive rules use the four-count cadence "Rock, Paper, Scissors, Shoot!", with both players revealing simultaneously on "Shoot." For informal play, agree on the cadence before the first throw.
The win cycle stays the same—Rock beats Scissors, Scissors beats Paper, and Paper beats Rock—even when names and cadences vary. Read the current official competitive rules before a sanctioned match, or explore the full history of Rock Paper Scissors.