What does gornish telfen mean in yiddish?

There is no such phrase in Yiddish as "gornish telfen". It's likely a misunderstanding or a made-up phrase.

Here's why:

* "Gornish" means "nothing" in Yiddish.

* "Telfen" means "to help" in Yiddish.

Putting these together would create a phrase like "nothing help" which doesn't make sense grammatically or in the context of the language.

If you're trying to convey a specific meaning, please provide more context or information about the source of this phrase.