Uh....
what part of that brought on the uh? Is it not possible to use words which are very decent and useful words in our language in culture today?
This is what it means:
“Although the English language, and particularly American English, contains many examples of the influence of racism on popular speech, in this particular case there is ample evidence to prove the defendant phrase not guilty. To call a spade a spade” not only predates slavery in North America by quite a bit but harks all the way back to the Ancient Greeks, occurring in the work of, among others, the playwright Aristophanes, and is still commonly heard in modern Greek. The original phrase seems to have been “to call a fig a fig; to call a kneading trough a kneading trough,” applied to someone who spoke exceedingly frankly. Evidently, when the phrase was first translated from Greek in the Renaissance, the Greek word for “trough” was confused with the Greek for “spade,” and thus the modern version was born. The “spade” referred to in the phrase, incidentally, was the digging implement, and not the black character on playing cards that underlies the racial epithet.
http://www.word-detective.com/back-w.html