rambunctious

Adjective

1. noisy and lacking in restraint or discipline; “a boisterous crowd”; “a social gathering that became rambunctious and out of hand”; “a robustious group of teenagers”; “beneath the rumbustious surface of his paintings is sympathy for the vulnerability of ordinary human beings”; “an unruly class”
   • Synonyms
     • boisterous
     • robustious
     • rumbustious
     • unruly
   • Similar to
     • disorderly
   • Related
     • unruliness
     • fractiousness
     • willfulness
     • wilfulness
     • boisterousness

From LookUp:

Adjective

1. Informal North American uncontrollably exuberant; boisterous a rambunctious tyke