people of dubious background (/questionable antecedents) ❍ 有我们这样老无知，老禽兽，不守本分，惯一招引～，上门吵闹。(《古今小说》卷三十九) There are people like us who are old fools,old beasts,who do not know our places but always induce people of dubious background to come here to kick up rows.