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innie

Informal term most commonly referring to a navel that is concave — sunken inward — as opposed to an outie (a protruding navel).

ˈɪniCurrent210 viewsLast reviewed Jun 29, 2026+ Add a definition
🗺️ Regional & Other
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#1·Apr 28, 2026

Informal term most commonly referring to a navel that is concave — sunken inward — as opposed to an outie (a protruding navel). Also used informally to describe an introvert, as a playful shortening. The navel sense is the more widely recognised usage in general conversation.

She had always had an innie but apparently some people switch after pregnancy.
Origin: Formed by adding -ie diminutive to in, contrasting with outie. Editorial expansion authored on Slangora.
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#2·Apr 27, 2026

An introvert.

For parents

"innie" means: An introvert.. This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.

For ESL learners

"innie" means: An introvert.. Register: neutral, standard English, usable in most everyday contexts. 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.

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#3·Apr 27, 2026

(informal) Anything concave; especially.

For parents

Innie means: Anything concave; especially.. 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 most families this word will pass by without incident; it is more a vocabulary curiosity than a parenting concern.

For ESL learners

innie means: Anything concave; especially.. Register: neutral, standard English. 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. A formal-English equivalent (a synonym or descriptive phrase) is usually safer in writing. When in doubt, paraphrase rather than reuse the slang form.

Cluster: general
Heard in the wild
  • “If nothing is real unless you complain about it on social media does my job even exist? What does my innie do all day?”

    — Bluesky· May 2026
  • “One day I’ll have an innie and my follower count will plummet…”

    — Bluesky· May 2026
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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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