One of the meanings of cracker in US usage as a disparaging term for a white person--generally describing a person living in the southern US who is poor and having socially conservative viewpoints. Although the term is usually considering disparaging, some groups have adopted the term as one of pride (c.f., "nigger" and "pig" for similar phenomena).
Long term residents of Florida and Georgia, in particular, call themselves Florida Crackers or Georgia Crackers to distinguish themselves from more recent immigrants to the state. Despite this usage, the use of the word "cracker" in the racial sense is a prosecutable offense under the Florida Hate Crimes statute.
