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Energizer bunny

(slang, idiomatic) A person who seems to have limitless energy and endurance.

ˈɛnɚˌd͡ʒaɪzɚ ˈbʌniCurrent50 viewsLast reviewed Jun 29, 2026+ Add a definition
🗺️ Regional & Other
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#1·Apr 27, 2026

(slang, idiomatic) A person who seems to have limitless energy and endurance.

Origin: From the Energizer Bunny, a pink rabbit toy character from the advertising campaign of Energizer, used to demonstrate the longevity of the batteries. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
For parents

"Energizer bunny" means: A person who seems to have limitless energy and endurance.. This is informal slang, common in casual speech, texting and social media, but not appropriate for school work, applications or professional settings. There is no real cause for concern in itself; it is everyday peer vocabulary. If your child uses it, a light comment about audience and register is usually enough — no need to escalate. Context, more than the word, tells you whether to follow up.

For ESL learners

"Energizer bunny" means: A person who seems to have limitless energy and endurance.. Register: informal slang, fine in casual conversation, texting and social media but not in academic essays, business writing or formal speech. A common non-native mistake is to use the word in the wrong register, or to assume one fixed meaning when it is actually polysemous; always check the surrounding register and the audience before producing it yourself. In formal writing, prefer a neutral synonym or a short descriptive phrase, and use this word only when you have heard or read it being used naturally in a comparable context.

Cluster: general
Heard in the wild
  • You don't hear much from him anymore, because once he paired up with the Energizer Bunny they both just kept going... true story

    Bluesky· May 2026
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For specific readers

"Energizer bunny" means: A person who seems to have limitless energy and endurance.. This is informal slang, common in casual speech, texting and social media, but not appropriate for school work, applications or professional settings. There is no real cause for concern in itself; it is everyday peer vocabulary. If your child uses it, a light comment about audience and register is usually enough — no need to escalate. Context, more than the word, tells you whether to follow up.

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.

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🗺️About Regional & Other slang

Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.

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