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in and out

What does in and out mean?

Cockney rhyming slang for snout; 'snout' in turn is prison slang for tobacco or an informer.

"Watch him, he's an in and out for the coppers."

Origin

'Out' rhymes with 'snout'; traditional London rhyming slang.

Frequently asked questions

What does 'in and out' mean in Cockney slang?
It's rhyming slang for 'snout', which itself is prison slang for either an informer or for tobacco.
How does the rhyme work?
The 'out' in 'in and out' rhymes with 'snout', following the standard Cockney rhyming-slang pattern.
How is 'in and out' used?
Most often to warn that someone is a police informer, as in 'watch him, he's an in and out for the coppers'.
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Slang definitions: FreeDict original editorial.