Learn how to say Cracker correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word cracker:
a person or device that cracks
a little paper roll used as a favor at parties: it contains a trinket or candy, and bursts with a popping noise when the ends are pulled
a thin, crisp wafer or biscuit
(US) poor white (contemptuous term)
([usually C-], informal) a person born or living in Florida or Georgia (a humorous usage)