rambunctious adj 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" [syn: {boisterous}, {rambunctious}, {robustious}, {rumbustious}, {unruly}]