It poses the same potency as STFU, but packs the punch of an antisemitic remark (though antisemitism is neither the soul nor the sole of the insult.) It is just one-up on STFU, though nothing else.
Although the "U" is substituted with "Jew," it still poses a prevalent rule within the insult itself. The 3-letter word (because Jew is not a letter) is pronounced: