Their rambunctious son always got into trouble.
他们那个不受管束的儿子老是惹麻烦.
《简明英汉词典》
It's not the chirping , rambunctious play that they did when they first arrived.
他们 现在 已经不像刚开始见面那会儿, 总是冲着对方乱叫,或者在玩耍时动作粗暴.
互联网
"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"
