Source : Webster's Revised Unabridged Dictionary (1913)

Ruffianly \Ruf"fian*ly\, a.
   Like a ruffian; bold in crimes; characteristic of a ruffian;
   violent; brutal.

Source : WordNet®

ruffianly
     adj : violent and lawless; "the more ruffianly element"; "tough
           street gangs" [syn: {tough}]