Translation for all the gentiles or even Jews with no exposure to Yiddish. "Yekke/Yechi" is the term for a German Jew. "Galizianer/Galitsiener" is the term for someone from Galicia, a region of what is now Poland and Western Ukraine. However, there are also secondary meanings. German Jews thought themselves cosmopolitan and above the country bumpkins from the east.
No, what I meant by the "yechis" are the confused Lubavitchers who shout "Yechi adonainu morenu v'rabbenu" as though the Rebbe OB"M is still alive.
They are by no means the majority of the Chabad leadership and the shluchim. They are annoying, but they are not overwhelming the movement.
A German Jew is referred affectionatly as a "Yekke."