- NARK
- Balance sheet plus
- Law enforcement officer
- Law enforcement officer (var.)
- Police informer
- Antidrug cop
- Stoolie
- Stoolie, to Brits
- Stratford stoolie
- Stoolie, in Stratford
- Speed investigator, informally
- Rat (on)
- London stoolie
- Stoolie in Surrey
- British informant
- British stoolie
- Stoolie, in Sussex
- Fighter in the war on drugs (var.)
- Rat, in Rugby
- Bobby's informant
- Sussex stoolie
- Stool pigeon
- Act the stool pigeon: Brit. slang.
- Stool pigeon, in England.
- Stool pigeon: Slang.
- British stool pigeon.
- Stool pigeon in London.
- Stool pigeon, at Scotland Yard.
- Stool pigeon: Brit.
- Informer, in British slang.
- Stool pigeon, in Britain.
- Informer: Slang.
- Stool pigeon, in Soho.
- Stoolie, in Southampton.
- British informer
- Scotland Yard stoolie
- Soho stool pigeon
- British cop's informant
- D.E.A. agent: Var.
- Informer, informally
- DEA agent
- English informant
- Scotland Yard informer
- Informer to Scotland Yard
