Tom: She's just out of blinker fluid.
Joe: Oh, that explains it.
Jon: "Did you check the blinker fluid?"
a really good almost-real-sounding term to use with the intent of throwing off a ditz.
James: "You're probably out of blinker fluid."
(later at auto zone)
Crystal: "I would like to buy some blinker fluid, please."
Clerk: "What the hell??"