Home › Words › R › randomerrandomerrandomer means A stranger; anybody; any old person.EtymologyFrom random + -er.nounA stranger; anybody; any old person.e.g.“Is that an open invitation to all and sundry randomers?” — 2009, eamo, “Longrow in Jim Murray's whisky bible 2007”, in uk.rec.motorcycles (Usenet):Definitions & examples from Wiktionary (CC BY-SA 3.0).