noun, plural jigaboos. Slang: Extremely Disparaging and Offensive.
1.
a contemptuous term used to refer to a black person.
Origin
1905-10, Americanism; perhaps blend of jijiboo (with same sense, origin uncertain) or jig4 and bugaboo
Word Origin and History for jigaboo
n.
insulting name for "a black person," 1909, perhaps from jig (q.v.), which had been applied insultingly to persons since late 18c., and ending from bugaboo.