SO stands for "significant other." People on the internet use it to refer to their spouse or partner. For example, someone might say, "I asked my SO if she wanted to get lunch." It's often us… See more

The phrase "significant other" has been around for a very long time. Its first use dates back to an article by American psychiatrist Harry Stack Sullivan, who explored th… See more

Most people use SO as a catch-all, neutral term for anyone you're in a relationship with. For example, when you're inviting your friends to a game night over Zoom, you might inclu… See more

Along with "SO," there are other slang terms used by people to refer to a partner or someone you're currently in a committed relationship with. Significant Other has some simil… See more