Cách sử dụng
"Smell a rat" means to sense that something suspicious or dishonest is going on. It is usually used when someone is suspicious of someone else's behavior or motives. For example, if you notice that your friend is acting strangely and hiding things from you, you might say "I smell a rat" to express your suspicion that they are up to something. It is a common expression in informal conversation and can be used in various situations.