Johnny Hopper means: A police officer.. It is informal slang, fine in casual speech but not suited to formal contexts. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.
Johnny Hopper
(UK, Cockney rhyming slang) A police officer.
Definitions
UK
#1·Apr 27, 2026UK
(UK, Cockney rhyming slang) A police officer.
Origin: Rhyming slang for copper. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
For parents
Johnny Hopper means: A police officer.. It is informal slang, fine in casual speech but not suited to formal contexts. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.
For ESL learners
Johnny Hopper means: A police officer.. Register: very informal, slang. Suitable only for casual conversation, chat and social media. Do not use in business, academic or news writing. A common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; native speakers immediately notice when slang appears in formal contexts, so always check the surrounding register before producing it yourself.
Cluster: authority_figure
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For specific readers
Why is this section here?
Slang is read by different audiences for very different reasons. The For parents view re-explains the term in plain, non-judgemental language so a caregiver can understand what their child means without needing the surrounding subculture. The For English learners view focuses on register (when it's safe to use), formal alternatives, and common mistakes — what a textbook won't teach you.
Used in
UK
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🇬🇧About British & Irish slang slang
UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.
See all British & Irish slang slang on Slangora.
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Other words near "Johnny Hopper" (J)
Johnny Armstrongjohnny bagjohnnycakeJohnny CitizenJohnny ForeignerJohnny Grindlejohnny houseJohnny-jump-upJohnny LawJohnny-one-noteJohnny onionsJohnny-on-the-spot
Browse all slang words starting with J.
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