I don't actually know much about it, but it's an antisemitic slur that originates(?) from a Shakespeare play by the name "The Merchant of Venice", which is what Shyemi was inspired from, I believe. The character in the play he's named after is a Jewish moneylender and that's all I really know.

From a few quick google searches: [slur] is a fictional character in William Shakespeare's play The Merchant of Venice. A Venetian Jewish moneylender, [slur] is the play's principal villain. His defeat and conversion to Christianity form the climax of the story. [slur]'s characterisation is composed of stereotypes, for instance greediness and vengefulness, although there were no legally practising Jews who lived in England during Shakespeare's time. Jews were expelled from the country in 1290 by Edward I in the Edict of Expulsion; this was not reversed until the mid-17th century. - via wikipedia.