What does SO mean?

A slang acronym for "Significant Other", a relationship partner.


Other definitions of SO:

  • Abbreviation for "significant other". This is a gender-neutral way to refer a partner in a relationship, like a boyfriend or girlfriend.
  • A transition word that can imply many things, including: 1) "Anyway...", 2) "Okay... who cares?", 3) "In a manner thus", among other things.

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How to use the term

  • Let me run it by my SO. We're going on a date that night, so it might not work.

  • Me and my S.O. have been together for a few years.

  • So... do you have anything else you can show us?


There are no references for SO at this time. We would greatly appreciate your contribution if you would like to submit your own!

More slang terms:


A slang adjective describing someone as unfortunate, rugged, or rough.



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