A person that has a white father and a black mother. Ex. "I thought shorty was just light-skinned but I saw her white pops and now know she's a graham cracker." Word comes from the fact that although a graham cracker is brown, it's still a cracker,or although a person may have brown skin,if their father is white, so are they.
Black Man:"I thought the chick was just light-skinned, but turns out her pops is white."
Me: "That's a graham cracker, bruh."