There is no Yiddish word that refers to a circumcised person. You would just say "a Man mit a Milah" (× ×ž×ן מיט × ×ž×™×œ×”), which means "a man with a circumcision"
לאנדסמאן - Landsman
In Yiddish, a good deed is usually referred to with the Hebrew word, "MITS-vah".
In Yiddish, you can say "klugnik" to refer to someone as a nerd.
The Yiddish word for a clumsy awkward person is "shlemazel." It is often used to describe someone who is unlucky or accident-prone.
The Yiddish word for crook is "gonif." It is commonly used to describe a thief or dishonest person.
The Yiddish word for Yiddish is "Yidish" (יידיש).
In person, most Yiddish speakers, religious or not, will greet with the familiar "Shalom Aleichem". Hopefully, another contributor will improve this answer, and add the telephone greeting.
וואַנץ, vants. It can refer both to an actual bedbug or to a loathesome, repellant person.
The Yiddish word for nosy is "shnorer."
Black person = Afrikanisch (×Ö·×¤Ö¿×¨×™×§×× ×™×©×
The Yiddish word for swindler is "gonif".
The Yiddish word for colored is "farblondzhet."