from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To initiate an encounter or interaction by behaving in an unrestrainedly aggressive, confrontational, or accusatory manner.
- v. To display spunk and strength of character, especially when rising above or when fighting back against trouble or adversity.
An allusion to the behavior of a boxer who immediately begins a boxing match or a round of a match by aggressively throwing punches in an unrestrained manner. (Wiktionary)