Wordnet 3.0
ADJECTIVE (1)
1. 
 characterized by disorderly action and disregard for rules; 
- Example: "a rough-and-tumble fight"- Example: "rough-and-tumble politics"- Example: "undisguised bare-knuckle capitalism"[syn: rough-and-tumble, bare-knuckle, bare-knuckled]
WordNet (r) 3.0 (2006):
bare-knuckle
    adj 1: characterized by disorderly action and disregard for
           rules; "a rough-and-tumble fight"; "rough-and-tumble
           politics"; "undisguised bare-knuckle capitalism" [syn:
           rough-and-tumble, bare-knuckle, bare-knuckled]