Dear Keiva: Re: schmeckelbeiser, I tried to look up "schmuck" which I have heard used in a decidedly pejorative way. If I remember correctly, in German it meant "adornment" of '"jewel". But I did find an interesting site about how often Yiddish words have been accepted in law, even in reported law cases.
http://www.law.ucla.edu/faculty/volokh/yiddish.htm