have a 20 on (someone)(redirected from has a twenty on you)
have a 20 on (someone)
slang To know or determine someone's location. "20" comes from the CB radio phrase "10-20," referring to one's location. A: "Does anyone have a 20 on Danny?" B: "Yeah, he told me he's at Main and Auburn." Let me know when you have a 20 on them.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.