one old cat
a form of baseball in which there is a home plate and one other base, and in which a player remains at bat and scores runs by hitting the ball and running to the base and back without being put out.
Also one o' cat, one-a-cat.
Origin of one old cat
An Americanism dating back to 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019