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Wiktionary
x's and o's

abbr. kisses and hugs. n. 1 tic-tac-toe 2 (context idiomatic sports English) The fundamental elements of a play. 3 (context idiomatic management English) The basic delineation of roles in a project.

Wikipedia
X's and O's

X's and O's, Exes and Ohs, Ex's and Oh's, and other homophonic variants in spelling of that phrase may refer to:

  • Xs and Os, another name for the game Tic-tac-toe