knock back = drink quickly
- He knocked back five glasses of whisky in ten minutes! You ‘d better drive him home!
- She poured some vodka into a glass and knocked it back as if it were water.
- He ‘s been knocking back alcohol for some time now. What is wrong with him?
- We just knocked back some beers and talked. It was relaxing.
- You said you would drink at your daughter ‘s wedding, so knock it back! Bottoms up! Empty your glass!
- Stop knocking back the champagne in front of our guests!
- I didn ‘t know you drink so much! You can really knock it back, can’t you?
- He just barged into the bar, knocked back two pints of beer and left.
- You can ‘t just knock back coffee like this. Take your time when you drink coffee.