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To drink something in fast, large gulps. Said especially of alcoholic beverages. A noun or pronoun can be used between "swill" and "down." He was swilling down wine throughout dinner, and he was nearly incoherent by the time we got to dessert. Let me just swill this down and I'll be ready to go.
swill something down
to drink something, especially an alcoholic drink, in great gulps. The guy took a quart of beer and swilled it down in a few seconds. He swilled down a quart of beer.
1. To drink something quickly: After the toast, we swilled down our beers. I poured a tall glass of orange juice and swilled it down.
2. swill down with To follow the ingestion of something, such as food, with the ingestion of some liquid: We swilled down the hot dogs with beer. I swilled the bitter medicine down with a glass of water.