Definitions of red-hot:

• adjective:   glowing red with heat
• adjective:   characterized by intense emotion or interest or excitement

  Example: "A red-hot speech"

• adjective:   newest or most recent

  Example: "Red-hot information"

• adjective:   having strong sexual appeal

  Example: "A red-hot mama"

• adjective:   very fast

  Example: "A red-hot line drive"