The Web ad features a tiger -- the animal, not the golfer -- wearing a black cap (you know, the type Tiger the golfer wears) driving an SUV into a fire hydrant.
"It's a jungle out there! Make sure you avoid all the obstacles and get the lowest fares," the ad said.
The company has also launched promotions using sexually suggestive acronyms that raised eyebrows among customers and eventually had the company executives feeling a bit "uncomfortable."
"I would expect no less from a company that shills for carryon bag fees by stuffing their CEO into an overhead bin for a YouTube video," Rick Seaney, CEO of airfare-search site FareCompare.com and an ABCNews.com columnist, said of the latest ad. "Spirit has been getting free publicity for years with ad campaigns that step right up to and lean over the line -- to me this one crosses that imaginary line by more than a few inches."