Meaning of O
What Does O Mean? (Using O Online)O means "Ounce (drugs)".
Summary of Key Points
Definition for OO means "Ounce (drugs)". This is the most common definition for O on Snapchat, WhatsApp, Facebook, and Twitter. Here is some more information about O:
A Text with O
Using O on a Cell Phone (SMS Texts, Whatsapp, and Yubl)