swifty
noun [ C usually singular ] informal uk/ˈswɪf.ti/ us/ˈswɪf.ti/
UK（很快喝掉的）一杯（尤指酒）
a drink, usually an alcoholic one, that you have quickly
We stopped in Covent Garden for a swifty and a snack. 我们在科文特花园停下来很快地喝了一杯，还吃了点东西。
（没有预先准备或者计划的）突然去做的事
something that you do suddenly, without giving any warning that you are going to do it
If you're playing with people you don't know too well, they can pull a swifty, change the key of a song, and suddenly you're singing badly and you can't work out why. 如果你和不太熟悉的人在一起玩，他们可能突然做点什么，把歌的调子变了，突然间你唱得很糟糕，却又不知道为什么。
- More examples
- The thinking was that he would only secure the truth about what was going on in the regional offices if he had a swifty with the local lads.
- When you've worked up a thirst, head to the saloon for a swifty.
- Needless to say I am hopeless at "swifties" and after downing a pint in 10 minutes was pretty drunk.
- He may try to pull a swifty on the electorate.