1) A spineless person, perhaps known for sucking dick. See also, bitchcake
2) Someone who takes it in the butt or mouth, and hence becomes a cake of jizz
3) Paris Hilton.
Note: May be followed by the phrases McGee, McCoy, or Philips to make it a nickname for the person in question.
"Hey, bitchcake. You're a jizzcake."