Red-hot (adjective)

1. Extremely hot and glowing red in color.
2. Extremely passionate or intense.

Origin:

The phrase "red-hot" is used to describe something that is extremely hot and glowing red in color.

Examples:

1. The iron was red-hot when he took it out of the fire.
2. The red-hot sun beat down on the desert.
3. The topic of the debate was red-hot and generated a lot of controversy.
4. The red-hot market for tech stocks was showing no signs of cooling down.
5. She had a red-hot temper and was quick to get angry.