During the MLB offseason you may hear the phrase "Hot Stove". According to the glossary on mlb.com this is what it means and where it comes from:
The Hot Stove
"The Hot Stove" refers to the Major League Baseball offseason, particularly the time around the Winter Meetings when free-agent signings and trades are most prevalent.
In the early days of baseball, Hot Stove Season referred to an actual baseball season: Hot Stove Leagues, in which MLB players would stay in shape by playing baseball in their hometowns while staying warm with actual hot stoves.
The term soon expanded to become a kind of predecessor to the water cooler -- on a cold day, fans would gather around the hot stove to discuss their favorite team.