Another">Another expression is

not so hot.

If you ask someone how she feels, she may answer "not so hot." What she means is she does not feel well.

Not so hot also is a way of saying that you do not really like something. You may tell a friend that the new play you saw last night is not so hot. That means you did not consider it a success.

A

hot shot

is a person, often a young person, who thinks he can do anything. At least he wants to try. He is very sure he can succeed. But often he fails. The expression was born in the military forces. A hot shot was a soldier who fired without aiming carefully.

Hot is a word that is often used to talk about anger.

A person who becomes angry easily is called a

hothead

. An angry person's neck often becomes red. We say he is

hot under the collar

. You could say that your friend is no hothead. But he got hot under the collar when someone took his radio.

In nineteen sixty-three,

hot line

appeared as a new expression.

The hot line was a direct communications link between the leaders of the Soviet Union and the United States. The hot line had an important purpose: to prevent accidental war between the two competitors during the period known as the Cold War. The American president and the Soviet leader were able to communicate directly and immediately on the hot line. This helped prevent any conflict during an international crisis.