What is # Typo?
When typing on an instant messenger, it is often that one will push the # key by accident, just as they press ENTER to send the message. It is very common and is often ignored by the recipient.
Alan: "Hey how r u?"
Guntar: "im fine thnx#"
Alan: "Your # typo was probably due to the fact you type too fast"
Guntar: "shut the fuck up"