If someone is discussing the subject of dogs and someone else begins talking about cats that is an example of being off topic. Otherwise, the subject is irrelevant to the discussion. The main topic is not being discussed.
Off Topic
If you're off topic, you're on a tangent. You are wandering or straying. To digress.
take off the al and its topic and it improves the answer
To meander on a topic has many different meanings. It can mean to contemplate, think about, or consider a topic. It can also mean to weave yourself around a topic.
When you are having a polite disagreement with someone.
You can get off topic if you don't stick to examples that support your thesis.
You can get off topic if you don't stick to examples that support your thesis.
Off Topic Mobile - 2013 was released on: USA: 2013
Off Topic - 2011 was released on: USA: 1 March 2011
Assuming you mean the RPG, it's hosted on BZPower.com in the Completely Off-Topic section.
drifting off topic following a pattern writing a strong topic sentence?
it mean a topic