Definition of rumbustious adjective from the Oxford Advanced Learner's Dictionary

 

rumbustious

 adjective
adjective
BrE BrE//rʌmˈbʌstʃəs//
 
; NAmE NAmE//rʌmˈbʌstʃəs//
 
(especially British English)(usually North American English rambunctious)[usually before noun](informal) Energetic
 
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full of energy in a cheerful and noisy way synonym boisterous a crowd of rumbustious football fans See related entries: Energetic Word Origin late 18th cent.: probably an alteration of archaic robustious ‘boisterous, robust’.