Word Origin & History
hoodlum1871, Amer.Eng. (first in ref. to San Francisco) "young street rowdy, loafer," later (1877) "young criminal, gangster," of unknown origin, though newspapers have printed myriad stories concocted to account for it. A guess perhaps better than average is that it is from Ger. dial. (Bavarian) Huddellump
"ragamuffin."