What is Sig O?
1.
A shortening of 'Significant Other;' particularly useful when addressing a mixed gender group with varied marital statuses. Frequently pluralized: sig o's.
You guys should come over tonight for the bowling tournament, and bring your sig o's.
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1.
aka lhl
when you laugh at something fashion
masha: "hey did u see donna karen's new clothing lines?"
gisele: "ye..