have nothing on someone or something
have nothing on (someone or something)
1. To have no discernible advantage over someone or something else; to not be any better than someone or something. Yeah, you're pretty good at basketball, but you have nothing on my older brother Steve. Video game systems have gotten pretty impressive in recent years, but in my opinion they have nothing on the classic systems from the '90s.
2. To have no decisive incriminating evidence against someone; to have no proof of wrongdoing or criminality about someone. The police can insinuate all they want, but they know they have nothing on me that'll stick.
3. To have no information available about someone or something. I got this history book for my report, but it has nothing on the topic I want to write about! The library is horribly outdated—it has nothing on the current president!
have (got) nothing on someone or somethingbe not nearly as good as someone or something, especially in a particular respect.
1998 Barbara Kingsolver The Poisonwood Bible Those glassy museum stares have got nothing on you, my uncaptured favorite child, wild as the day is long.