It means healthy, just like the German word "gesund"
Basically it means Be healthy, or go in good health. It's often used in a sarcastic exasperated way, like "You want to take the car and leave me stranded here with nothing to do and no one to talk to? Fine. Here's the keys. Zei gesundt." (Use it in good health)
"Redstu Yiddish" is Yiddish for "Do you speak Yiddish?"
In Yiddish, you can say "eynzik" to mean okay.
It is the Yiddish word for a woman who is not Jewish. It is slang in English, but it is not slang in Yiddish.
Bling is not a Yiddish word or a Hebrew word.
Just as in Hebrew, in Yiddish Shalom can mean "peace," but depending on the context, it can also mean hello or goodbye.
"Schuss" in Yiddish can mean "nonsense" or "foolishness." It is often used to dismiss something as trivial or not worthwhile.
The Yiddish word "yochna" means "to understand" or "to comprehend."
Spinoza is not a Yiddish word. It appears to be a Spanish name.
The Yiddish word for congratulations is Mazeltov.(pronounced MUZZLE-TOF)
"Zeideh" means grandfather in Yiddish. It is a term of endearment or respect used to refer to one's grandfather in the Yiddish language.
There is no such language as Jewish. You probably mean either Hebrew, Ladino, or Yiddish, but this word doesn't exist in any of these languages.