Adjective: (Prejorative) A term of derision given by black folks to a mixed race person, referring to the alleged fact that their momma was a 'ho and their papa was a john. (Related term: zebra)
Popularized by the 1967 novel "Trick Baby: The Story of a White Negro" by Iceberg Slim (Robert Beck).
I cut in. I was hot as hell. I said, "Goddamnit, Mr. Murray, I was no trick baby. My mother was no whore. She married a white man. Do I have to pin her marriage license to my chest? And Blue and I haven't done anything to wind up dead."
He said, "I'll believe a license when I see it. I'm bullshit proof...."
-- Iceberg Slim, "Trick Baby"