The phrase "matter of the moment" typically describes a situation or issue that is currently occupying people's attention and generating discussion or controversy. However, there are several synonyms that can be used to convey similar meanings. Some of these include "hot button topic," "current issue," "headline news," "buzzworthy subject," "pressing concern," and "timely matter." Each of these terms suggests a sense of urgency and importance, but they may also carry slightly different connotations depending on the context in which they are used. Regardless of the specific synonym chosen, all convey the idea that a particular issue is capturing people's interest and sparking discussion.