We know exactly what the word means. The American Heritage Dictionary of the English Language has
two definitions, you guys don't seem to know about the second one:
1. A member of the National Socialist German Workers' Party, founded in Germany in 1919 and brought to power in 1933 under Adolf Hitler.
2. often
nazi An adherent or advocate of policies characteristic of Nazism; a fascist.
The second use of the term is
slang, which means "the non-standard vocabulary of a given culture, consisting typically of arbitrary and often ephemeral coinages and figures of speech characterized by spontaneity and sometimes by raciness". Of course
bullshit usually means "talking out of one's ass" (to define a term used in the reply to the post that started this charming digression)...