Welcome to English in a Minute.If you have heard American English or watched an American TV show,you probably have heard this:Hear a pin drop.What does this phrase mean?Let's see whether we can find out by listening to an Amercian English conversation.
A:I can't believe he said that.And then the room was so quiet.Nobody said a word.
B:Really?
A:Yeah,I mean it was so quiet you could hear a pin drop.
Pins are small and don't make noise when they fall to the floor.So when you say you can "hear a pin drop,"it means that the room is silent.Usually,that's because the people are surprised or excited about something.
And that's English in a Minute.