(n): food made from dough of flour or meal and usually raised with yeast or baking powder and then baked
(n): a poor White person in the southern United States
(n): an unsophisticated country person
(n): a programmer who cracks (gains unauthorized access to) computers, typically to do malicious things
(n): a person who designs and writes and tests computer programs
(n): firework consisting of a small explosive charge and fuse in a heavy paper casing
(n): (usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc.
(n): a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends
(n): souvenir consisting of a small gift given to a guest at a party
More ominously, a white slave driver--the one who cracks the whip. Also used derisively as a term from someone from the South.
Crackers are a family food - happy families. Maybe single people eat crackers, I don't know. Frankly, I don't want to know. It's a market we can do without!