FO has 2 meanings
1. What does FO mean in messages?

Far out

FO is shorthand for "far out," a common phrase in the 1970s. People use it to describe something excellent, like a great movie or a job promotion.

Since it is shorthand for an old phrase, boomers and older will likely use FO in messages and on social sites. For example, when sharing with your dad that you will be coming home for the weekend, he may reply with, "FO! Looking forward to it." Or, you might text your grandma about an upcoming Earth, Wind, and Fire concert, and she replies with, "FO, my love. U wanna go w me?"


Those new sneakers are fo!
Thx. I luv em!

Jamie Lee Curtis is FO

Related Slang


Updated June 13, 2023
2. What does FO stand for?

Freaking out

The acronym FO can stand for "freaking out." If someone tells you that you're FO, they think you're stressing out too much.

The phrase "freaking out" comes from 1960s counterculture, in which hippies and other LSD users used the term to refer to a negative reaction to their psychotropic drug of choice. From there, people began applying the term to other irrational, paranoid, or stress-related behavior.


He was FO over what was just a small misunderstanding

Don't FO; everything's cool

Related Slang


Updated October 27, 2020

FO definition by

This page explains what the acronym "FO" means. The various definitions, examples, and related terms listed above have been written and compiled by the team.

We are constantly updating our database with new slang terms, acronyms, and abbreviations. If you would like to suggest a term or an update to an existing one, please let us know!