have a 20 on (someone)

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.
See also: 20, have, on
Farlex Dictionary of Idioms.
See also:
  • get a 20 on (someone)
  • a/(one's) 20
  • any old place
  • any old thing, time, place, etc.
  • a/s/l
  • a hop, skip, and a jump
  • hop, skip, and (a) jump
  • hop, skip, and jump
  • skip
  • (you) can't get there from here