Definition of Ruffianly

Babylon English Dictionary
like a bully, like a thug, like a brute, in a tough and violent manner
brutal, lawless, aggressive, violent, tough
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Ruffianly Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(a.)
Like a ruffian; bold in crimes; characteristic of a ruffian; violent; brutal.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
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ruffianly
ruffle \ruf"fle\, n. [see ruffle, v. t. & i.]
1. that which is ruffled; specifically, a strip of lace, cambric, or other fine cloth, plaited or gathered on one edge or in the middle, and used as a trimming; a frill.
2. a state of being ruffled or disturbed; disturbance; agitation; commotion; as, to put the mind in a ruffle.
3. (mil.) a low, vibrating beat of a drum, not so loud as a roll; -- called also ruff. l. scott.
4. (zo?l.) the connected series of large egg capsules, or o?thec?, of any one of several species of american marine gastropods of the genus fulgur. see o?theca.

WordNet 2.0

Adjective
1. violent and lawless; "the more ruffianly element"; "tough street gangs"
(synonym) tough
(similar) violent