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geek out

B1 informal inseparable intransitive
In simple words

To get really excited and talk a lot about something you love, especially something nerdy or technical.

Literal meaning: A geek (enthusiast) fully comes out — they let their passion show completely.

Meanings

1 B1 idiomatic informal

To express intense, unrestrained enthusiasm about a niche or technical subject.

"Sorry — I tend to geek out about typography whenever someone asks me about design."

Grammar: inseparable
2 B1 idiomatic informal

To spend time deeply engaged in a technical or hobby-related activity with great enjoyment.

"We stayed up until 2 a.m. geeking out over retro video games from the 1980s."

Grammar: inseparable
Usage notes

Positive in connotation — the speaker is usually cheerfully aware of their own enthusiasm. Very common in internet and pop culture discourse. Often followed by 'about' or 'over'. Part of the broader reclamation of 'geek' as a positive identity.

Commonly used with

technology comics science history films data

Forms

Base
geek out
I/you/we/they
3rd person
geeks out
he/she/it
Past simple
geeked out
yesterday
Past participle
geeked out
have + pp
-ing form
geeking out
continuous

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Synonyms

nerd out enthuse geek over obsess over go deep on fanboy over

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