happy as a sandboy
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Related to happy as a sandboy: happy as a clam, happy as a lark, happy as Larry
happy as a sandboyBRITISH, OLD-FASHIONED
If you are happy as a sandboy, you are very happy. He's all smiles and happy as a sandboy. Note: Sandboys were boys or men who sold bags of sand from carts. It is possible that they were described as `happy' because they had a reputation for spending their money on alcohol.