"rowdy" in the noun sense
1. bully, tough, hooligan, ruffian, roughneck, rowdy, yob, yobo, yobbo
a cruel and brutal fellow
"rowdy" in the adjective sense
1. raucous, rowdy
disturbing the public peace loud and rough
"a raucous party"
"rowdy teenagers"
Source: WordNet® (An amazing lexical database of English)
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