An alligator. They're called Florida speed bumps by locals in non-metro areas of Florida because alligators tend to use the sunlight heated roads as heat rocks. They sprawl out across the middle of the road, and serve as a huge, scaly, armor plated speed bump. The bigger ones will not flatten if you hit them, it will just tear up your car real good.
Dale - "Hey Jamie, what the hell did we just hit?"
Jamie - "I reckon we just hit one hell of a Florida speed bump!"
Jamie - "I reckon we just hit one hell of a Florida speed bump!"
by ConfederateFlorida September 22, 2009
A manatee. They are hard to spot in the water, and a motorboat driving over it can injure or kill the manatee if the blades are moving fast enough. Because manatees are threatened, Florida laws typically require boats to drive slower in rivers and coastal areas to protect the manatees, should you drive over one with a motorboat.
“And if you look to your left, you can see a manatee grazing near the shore, or as we like to call them, Florida speed bumps… Yeah, I know it’s a dark joke”
by greglinsanity June 14, 2022