Is there a word in English that begins with F and the meaning is police? I think it must be informal and British English.
List of slang terms for police officers - Wikipedia, the free encyclopedia
Get a load of this first and they will be happy to answer any further questions.
'The Fuzz' is slang for the police. Its origin is in American hippie slang.
"The filth" is another. Try not to use it, it's not pleasant at all.
The Feds/feds is also used. It has crossed over from the US to Britain- it came to public attention in the recent riots in the UK, where the suspect who was shot by police texted to his partner that the feds were on his tail. The Wikipedia page suggests that it refers to the FBI and higher federal law enforcement, but in the UK it is being used by many as another term for the police in general.
"Five-oh" is another.