Top Definition
Anyone who inadvertently shares a secret. Sounds like a term dating back to the Prohibition era. LLM can also be used in texting.
You silly goose, loose-lipped moron! If it wasn't for that loose-lipped moron, we'd still have a still. One loose-lipped moron spoiled the surprise party.
by Independent Copy Editor August 25, 2011

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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