Meaning

noun an aggressive and violent young criminal

originFirst attested in a December 1866 Daily Alta California article, which mentions "the 'Hoodlum Gang' of juvenile thieves". Several possible origins have been proposed. It may derive from a Germanic word like Swabian hudelum (“disorderly”) or Bavarian Haderlump (“ragamuffin”). Herbert Asbury's book The Barbary Coast: An Informal History of the San Francisco Underworld (1933, A. A. Knopf, New York)…

Etymology from Wiktionary, CC BY-SA 3.0