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gob iron

A wonderfully vivid slang term for a harmonica — specifically the simple, diatonic kind you might find in a blues musician's shirt pocket or a busker's case.

ˈɡɑb ˈaɪɚn127 viewsLast reviewed Jun 29, 2026+ Add a definition
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Australia
#1·Apr 28, 2026AUS

A wonderfully vivid slang term for a harmonica — specifically the simple, diatonic kind you might find in a blues musician's shirt pocket or a busker's case. 'Gob' is British and Australian slang for mouth, and 'iron' nods to the metal construction, making the compound both descriptive and slightly unglamorous. It's the sort of name that sounds like it was coined by someone who thought harmonicas were a bit too earnest to get a fancy title.

He pulled a battered gob iron from his jacket and started playing a Delta blues riff right there on the platform.
Origin: British slang compound: 'gob' (mouth, from Irish/Scottish Gaelic 'gob' meaning beak or mouth) plus 'iron' referring to the metal instrument played with the mouth. Editorial expansion authored on Slangora.
Cluster: easy
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Global
#2·Apr 27, 2026Global

(slang) A simple harmonica.

For parents

Gob iron means: A simple harmonica.. 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

gob iron means: A simple harmonica.. 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.

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