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wash something down something
to get rid of something by flooding it down the sewer, drain, sink, etc. Wash all the soap suds down the drain and clean the sink, please. Please wash all that stuff down the drain.
wash something down(with something)
1. to clean something by flooding with water, alcohol, etc. The doctor washed the area down and began to stitch up the wound. She washed down the wound with alcohol to clean it thoroughly. Todd washed the driveway down with water.
2. Fig. to use fluid to aid the swallowing of food or medicine. Molly washed the pills down with a gulp of coffee. She washed down the pills with a glass of water.
1. Clean by washing from top to bottom, as in He always washes down the walls before painting. [Second half of 1800s]
2. Drink a liquid after eating food or taking medicine, as in He washed down the pills with a glass of water. [c. 1600]
1. To cleanse the surface of something using water or other liquid: We washed down the walls. My neighbor washed the car down.
2. To cause something to be carried or drawn down by the action of water or similar liquid: We tried to wash the grease down, but it stuck to the sides. I washed the tar down with the hose.
3. To follow the ingestion of something, such as food, with the ingestion of a liquid: After the party, we washed the cake down with coffee. I washed down the medicine with some juice.