Jigaboo is a racial term directed toward African Americans.
The jigaboo burger is what a jigaboo orders when he/she goes to Burger King.
The burger is a normal Whopper sandwich with extra pickles and loads of mustard, usually accompanied by a fruit punch drink.
Randy:"Welcome to Burger King what can I get for you?"
Jigaboo: "Yeuh. Gimmee one o' dem Whopper meals, and throw on sum extra pickles and musturd. Gimme a large fruit punch too dawg."
Randy: "Drive through needs a jigaboo burger!!!"