Wordnet 3.0
NOUN (1)
1. 
 an aggressive and violent young criminal; 
[syn: hood, hoodlum, goon, punk, thug, tough, toughie, strong-armer]
WordNet (r) 3.0 (2006):
strong-armer
    n 1: an aggressive and violent young criminal [syn: hood,
         hoodlum, goon, punk, thug, tough, toughie,
         strong-armer]