American slang for a Southern white
man, used as a slur to suggest white trashiness, an uneducated, low-class or poor
man. Derived from those who would distill moonshine liquor from fermentation of dried, cracked
corn.
"You know, they think that because of who I am and where my political
base has traditionally been, they may want me to go sort of hustle up what Lawton Chiles used to call the 'cracker vote' there." - President Bill
Clinton, 2008. on Larry
King Live (CNN).