The liquid in one's vehicle which causes the turn signals to activate. When one's blinker fluid is empty, the result is the inability to use one's turn signals.
Joe: Damn! I almost hit that SUV that just turned into my lane!
Tom: She's just out of blinker fluid.
Joe: Oh, that explains it.
Tom: She's just out of blinker fluid.
Joe: Oh, that explains it.
by t_spread April 17, 2006
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