When we divert our attention from the main topic of discussion, it is often referred to as "off the subject." However, there are numerous synonyms that we can use in place of this phrase, depending on the context of the conversation or situation. Some commonly used alternatives that convey a similar meaning include "irrelevant," "tangential," "off-topic," "off-track," "digressive," and "divergent." Other synonyms that can be used in specific scenarios include "beside the point," "not germane," "inapplicable," and "unrelated." By using these synonyms, we can add variety and depth to our language while also conveying clearer meaning in communication.