round robin 
noun
1 [often as modifier] A tournament in which each competitor plays in turn against every other: a round-robin competition...
- He suffered an initial setback in his quest to wrest the crown from the Soviets when he came fourth with a final score of 14/27 in the quadruple round-robin tournament.
- When the roads were snowed over and street hockey was out of the question we played this from dawn to dusk in massive round-robin tournaments.
- He decided to ‘do something about it,’ by organizing a Category 10 round-robin tournament at the famed Marshall Chess Club in New York.
1.1A series or sequence: an inconclusive round robin of talks in Cairo, Washington, and New York...
- The trial itself was a confusing round-robin of various witnesses being called over various issues at random.
- Many are poets or aspiring poets, many are gay, and all take turns in a comical round-robin of flirtation, consummation, and rejection.
- As Rodova remembers it, at the last line of the poem, when John dies, the dancer's head drops in identification, completing the round-robin of identity exchanges.
2A petition, especially one with signatures written in a circle to conceal the order of writing.We don't want round robins, we want the letters to be personal letters saying why the decision over Metrolink is bad news for you, for your business, your family or your job.