Not so hot also is a way of saying that you do not really like something.

VOA: special.2009.12.06

A hot shot is a person, often a young person, who thinks he can do anything.

VOA: special.2009.12.06

They could better handle hot,dry climates because they do not have a lot of wool.

VOA: special.2009.08.03

Do this when the weather is not too hot and not too cold.

VOA: special.2009.04.28