have the law on somebody
have the law on (someone)
To inform the police of someone's activities. Primarily heard in UK. I'll have the law on you if I catch you on my property again!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
have the ˈlaw on somebody(British English, informal) (often used as a threat) report somebody to the police: If you have just one more noisy party, I’ll have the law on you.
Farlex Partner Idioms Dictionary © Farlex 2017