Yiddish: On all his talk you could build a church.

He talks big but you can't believe what he says.  SOURCE: Stutchkoff, Der Oytser fun der Yidisher Shprakh.

אויף זײַנע רייד מעג מען בויען אַ קלויסטער.

Af zayne reyd men meg boyen a kloyster.

On all his talk you could build a church.