nark

  1. (British) an informer or spy working for the police
  2. a lawman concerned with narcotics violations

nark

[n] - (British) an informer or spy working for the police 2. [v] - inform or spy (for the police)
Found on http://www.webdictionary.co.uk/definition.php?query=nark

nark

copper`s nark noun an informer or spy working for the police
Found on https://www.encyclo.co.uk/local/20974

Nark

If someone is in a nark, it means they are in a bad mood, or being grumpy. It's also the word for a spy or informant. For example a coppers nark is someone who is a police informant
Found on http://www.effingpot.com/slang.shtml

Nark

Nark is British, Australian and New Zealand slang for an informer or spy, especially one working for the police.
Found on http://www.probertencyclopaedia.com/browse/ZN.HTM

Nark

Spoilsport.
Found on http://www.translationdirectory.com/glossaries/glossary026.htm
No exact match found