"You-know-who" is a phrase used to refer to a particular person without actually stating their name. This could be because the person is either infamous or their name is not known to the intended audience. Nevertheless, there are alternatives to the phrase that can be used to describe such individuals, such as "the nameless one," "the anonymous individual," or "the unmentionable character." Other possible synonyms include "the infamous figure," "the mysterious person," or simply "the one we do not speak of." These synonyms provide an effective way of referring to a person without using their actual name and are particularly useful in situations where the anonymity of the person is crucial.