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Idioms for one-on-one
Origin of one-on-one
British Dictionary definitions for one-on-one
Idioms and Phrases with one-on-one
A direct encounter between two persons, especially a conflict, as in The two department heads went one on one regarding shelf space. This slangy expression almost certainly comes from sports. It is commonly used to refer to a two-person basketball game, but is also applied to the interaction of two players on opposing teams in football, soccer, and similar team sports. [c. 1960]