ram ‧ bunc ‧ tious /ræmˈbʌŋkʃəs/ BrE AmE adjective American English
[ Date: 1800-1900 ; Origin: Probably from rumbustious 'rambunctious' (18-21 centuries) ]
noisy, full of energy, and behaving in a way that cannot be controlled:
three rambunctious kids