informal expression

dunno

don't know

"Where is he?" "I dunno."

"Where is he?" "I dunno."

dunno don't know "Where is he?" "I dunno."

Synonyms: I don't know, no idea, beats me

A phonetic spelling of the relaxed pronunciation of 'don't know'.

Think of the sound of someone shrugging and saying 'don't know' quickly. The sounds merge into 'dunno'.

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