stepshithead

noun. A non-biological relative with a pu pu platter instead of a corpus collosum.

Real citation: “Like Kateri, I think that there would be more fathers than shitheads (and as a child of a shithead and stepshithead, I feel that this would help keep the shitheads out of the kids lives). Can you imagine the positive influences REAL men, fathers, would have on the development of the children?”
(April 3, 2006, http://wetfeet.typepad.com/wet_feet/2006/04/more_marriage_t.html#comment-15739256)

Made-up citation: "My parents never divorced, so I've been deprived of the pleasures of stepshitheads. All my neuroses are undiluted, weapons-grade, DNA-soaked, straight from the source."