be the bomb
be (the) bomb
To be excellent, extremely entertaining, or of very high quality. This steak I ordered is bomb! I'm not usually a fan of action films, but that one was the bomb!
be the bombAMERICAN, INFORMAL
If something or someone is the bomb, they are very successful, popular or attractive. Karen Forsley's watches are the bomb with the in crowd. So this is the bomb — the best superhero movie ever.