drop a dime

English

Etymology

See dime#Etymology 2

Verb

drop a dime

1. (idiomatic, slang) To make a phone call, usually means calling the police to report another's activities.

   He was in the back for a few minutes. Turned out he was dropping a dime on Ralph.

   • 1995, Clockers, 00:26:00:

     We got a crowd of black, white customers, out-of-state license plates, what have you. Somebody gonna check that out. They gonna drop a dime on me, call 911. With my jacket, I can't go back to jail.