adjective
1.
( of metal or sth burning ) so hot that it looks red :
Red-hot coals glowed in the fire.
2.
showing strong feeling :
her red-hot anger
3.
( informal ) new, exciting and of great interest to people :
a red-hot issue
4.
used to describe the person, animal or team that is considered almost certain to win a race, etc. :
The race was won by the red-hot favourite .