The phrase "gat bandwagon" refers to joining a popular trend or movement just for the sake of being part of it, without necessarily understanding or believing in its values or principles. There are several synonyms for this behavior, including "jumping on the bandwagon," "following the crowd," "conforming," "sheep mentality," and "peer pressure." These terms describe the pressure people feel to conform to the opinions and actions of those around them, even if it goes against their own beliefs. It's crucial to remember that just because something is popular doesn't necessarily make it right, and it's essential to think critically and make independent decisions.