See: HAVE NOTHING ON.
{v. phr.} Not to be any better than; to have no advantage over. * /Susan is a wonderful athlete, but when it comes to dancing she has nothing on Mary./ * /Even though he is older, John has nothing on Peter in school./ * /Although the Smiths have a Rolls Royce, they have nothing on the Jones' who have a Cadillac and a Jaguar./ 2. To have no information or proof that someone broke the law. * /Mr. James was not worried when he was arrested because he was sure they had nothing on him./ * /Mr. Brown was an honest politician and they had nothing on him./