(games) A children's game in which players take turns to place S's and O's on a grid, collecting points by creating an "SOS" sequence.

Initialism of shit on a shingle.

plural of so

plural of SOS

plural of SO

(idiomatic) Up to this point, all is OK.

simple past tense of so they say

Indicates that the speaker identifies with a prior statement to a much lesser degree (or not at all) than the other person. / Indicates that one factor is much more relevant or important than another.

(now chiefly Scotland and Northumbria) A particular amount, often a large or excessive amount; so much. / (now chiefly Scotland and Northumbria) A demonstrated amount.

(now chiefly Scotland and Northumbria) To a certain degree or extent; so much.