It turns out, it means nothing, really. In fact, there’s no such thing as “blinker fluid.” The concept is an old joke among those who know about cars — to test those who don’t know about ...

Nor do muffler bearings, or summer air for your tires. But actually, in the case of the first-generation Dodge Viper, blinker fluid does exist. And the tale of why is quite interesting.

Videos of reverse-blinker fluid pranks are also popular on TikTok, including one of a woman returning to a car full of men and getting the last laugh when she reveals, “I found it!” ...