There are numerous synonyms for the phrase "undeserving of attention" that can be useful in various contexts. One of the most common phrases used is "unworthy of notice," which emphasizes the idea that the person or thing in question does not merit any consideration or acknowledgement. Another synonym is "insignificant," which implies that the subject is so unimportant that it does not warrant any attention. Similarly, "trivial" and "unimportant" convey the same meaning. "Inconsequential" and "irrelevant" are more precise synonyms for situations where the object does not hold any significance to the discussion at hand. Lastly, "negligible" and "unremarkable" can be used to indicate that the attention is undeserving due to the lack of any memorable features.