wash something down with something

Từ điển Oxford Advanced Learner 8th

ˌwash sthˈdown (with sth) derived
1. to clean sth large or a surface with a lot of water
•Wash down the walls before painting them.
2. to drink sth after, or at the same time as, eating sth
•For lunch we had bread and cheese, washed down with beer.
Main entry: ↑wash_derived