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The black cow flies at midnight means anything you want. Also used for guy code, "is your girlfriend, wife, significant other around"? This phrase is used to check if the coast is clear.

This phrase is also used to speak in code for any real day situation: is the black cow flying at midnight?

Examples: when you don't want people around to know what you are talking about.
Yo bro, the black cow flies at midnight?


Ok let me know when your girlfriend leaves.....
by Bigdogdaddy13 January 26, 2013