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1.
Originating from the 2004-2005 baseball season, "Yankee Hangover" refers to the feeling one gets from staying up all night watching a Yankee game. It was first used in September 2005 for the Yankees vs. Red Socks playoff games, which commonly lasted well into the night--most ending at 1:30-2:30 in the morning.
Guy1: "That Yankee vs Redsocks game went into the 12th inning last night, and I watched it until the end. Man, I'm exhausted and can't think straight!"
Guy2: "Sound's like your suffering from a bad case of Yankee Hangover."
by Christina S August 22, 2006