An Etymological Dictionary of the German Language/Annotated/Kropzeug

Kropzeug, neuter, ‘rogues,’ a Low German word, formed from Low German krôp (compare kriechen), ‘crawling creature, small cattle,’ but this is not quite certain. Others connect it with the preceding word Kropf, which also signifies in Suabian and Bavarian ‘small, crippled creature, little man.’