be on the houseFREE/COST NOTHINGif drinks or meals are on the house, you do not have to pay for them because they are provided free by the owner of the bar, restaurant etc 由店家赠送,免费招待be on the house• On New Year's Eve, he offered a glass of champagne to everyone, on the house.• The owner let us have the first bottle of wine on the house.• First drink is on the house.
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