What Does Y/O Mean?Y/O means "Year-Old".
Summary of Key Points
Definition for Y/OY/O means "Year-Old". This is the most common definition for Y/O on Snapchat, WhatsApp, Facebook, Craigslist, Tinder, Zoosk and Match.com, as well as in text messages and on chat forums. Here is some more information about Y/O:
1: Easy to guess
Adults and Teenagers
A Text with Y/O
Using Y/O on a Cell Phone (SMS Texts, Whatsapp, and Tinder)