have nothing on

have nothing on or not have anything 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.