Wordnet 3.0
NOUN (1)
1.
a cruel and brutal fellow;
[syn: bully, tough, hooligan, ruffian, roughneck, rowdy, yob, yobo, yobbo]
WordNet (r) 3.0 (2006):
yobo
n 1: a cruel and brutal fellow [syn: bully, tough,
hooligan, ruffian, roughneck, rowdy, yob, yobo,
yobbo]