Yiddish: If a thief has nothing to steal, he steals the hat off his own head.

SOURCE: Stutchkoff, Der Oytser fun der Yidisher Shprakh.

אַז אַ גנבֿ האָט ניט וואָס צו גנבֿענען גנבֿעט ער דאָס היטל פֿון זיך אַראָפּ.

Az a ganef hot nit vos tsu ganvenen, ganvet er dos hitl fun zikh arop.

If a thief has nothing to steal, he steals the hat off his own head.