Jerry Lewis Freestyle Raps … IN YIDDISH!!!

Exclusive 060713_jerry_lewis_launchJerry Lewis has mad Yiddish flow … or maybe it”s mad gibberish flow … either way, it was definitely an attempt at a freestyle rap … and our sources has the footage.

The 87-year-old legend unleashed his skillz last week in between shooting scenes for his movie “Max Rose” — when he injected himself into a rap battle with “America”s Got Talent” sensation Chris La Vrar (who just happened to be on the set that day).

Lewis — impressed with La Vrar”s rhymes — replied, “Very good. Very, VERY good … I want to do one now in Jewish.”

The crowd laughs — but Jerry was SERIOUS — and busts out a rap that you”ve just GOT to hear … especially if you”re a Yiddish scholar … because then you can tell us what he says.

Seriously, we tried to make out the words … but no dice.

So … help