To be speaking in jocund terms about something more serious. To speak of something in a manner less serious than it should be, while still maintaining the adamancy of your beliefs.
Mike: Those FAMU boys actually think it's their right to have homecoming in this town again this year.
Josh: Boy, you ain't whistlin' Dixie.
Josh: Boy, you ain't whistlin' Dixie.
by fsudixiecrat December 13, 2010
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