What does 121 Mean in chat?

This one is pretty easy 121 means One to one  This is not a commonly used in text or chatting however there are people that still use this term. The reason most people don’t use it because there it can be confusing to the other person who might assume their friend or buddy is talking numbers

What is the meaning of 121 in chat?

In a sentence someone might say: “121 I think I’m going watch the super bowl at the local pub just don’t tell the wife!”

121    = “One to One.”  

121 in Chatting

121 is not a commonly used word so I wouldn’t make it a habit of using it in 2013 and going forward!