A meme that originated from a racist cartoon that depicted a black person speaking gibberish, represented as faux-English words. Two of the "words" that appeared, "bix nood," became popular among users of the site www.4chan.org's "/b/" (random) image board. As a result, bix nood came to mean anyone of African American persuasion, although it may also be used in conjunction with othe words to form a nonsensical catchphrase. It is often perceived as a racial slur due to its origins, although this is debatable seeing as the African American population (and population in general) is not familiar with this term.
My friend told me about a bix nood that took a bus to his house and smoked pot with him.