- boisterous, rambunctious, robustious, rumbustious, unruly - 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"
Antonym: orderly (indirect, via disorderly)