是不是觉得自己已经能够说一口流利的英语了呢？是不是觉得“老外”们的话还是听不太懂呢？是不是觉得他们的话里“俚语”太多了呢？俚语又究竟是个什么东东？Slang is informal language and has a shorter "life-span" than other English words. Nevertheless, you will find all of these words in a good monolingual dictionary and slang is a common part of daily life to most native speakers.
You lot must think I'm stupid .
I met some bloke in the pub.
I need to spend a penny.
That fish is a bit dodgy, he's a dodgy person.
Keep your hair on! - Calm down!