omigod
怎么一到时候又想不起来了
平时老用的恐怕自己也意识不到是SLANG了
一个比较不常用的: knock sb. up
It is only different in American English, meaning:
making sb. pregnant. in british English it just means
knocking sb. up literally.
And I don't quite understand those slangs with
"balls" in them