tar baby
n.1. A inextricable situation or difficult and pressing problem that often grows worse as one tries to deal with it.
2. Offensive Slang Used as a disparaging term for a black person, especially a dark-skinned black child.
[After "Brer Rabbit and the Tar Baby," an Uncle Remus story by Joel Chandler Harris in which Brer Fox makes a doll out of tar and Brer Rabbit gets stuck in it when he punches it after it does not return his greeting.]