He's no good at reading Hebrew. SOURCE: Furman, Yidishe Shprikhverter un Rednsartn. Compare:
Er iz shtumpik af der ivre. | .ער איז שטומפּיק אויף דער עבֿרי
He's dull-witted when it comes to reading Hebrew.
SOURCE: Furman, Yidishe Shprikhverter un Rednsartn