Definition
to swiftly consume a drink, particularly a significant amount of alcohol
猛喝；飲尽（尤指酒精飲料）
They knocked back a few whiskeys at the party.
他們在派對上快速喝下了幾杯威士忌。
If you keep knocking back drinks like that, you're going to feel ill.
如果你一直這樣快速喝下飲料，你會感覺不舒服的。
After celebrating their victory, the team members eagerly knocked back the champagne.
慶祝勝利後，隊員們急切地喝下了香檳。