Wikipedia is the greatest frickfracker that a squankus could hope for:

A placeholder name is used to refer to an object whose name is either irrelevant or unknown in the context which it is being discussed. These placeholders typically function grammatically as nouns—and can be used for people (e.g. John Doe), objects (e.g. Widget), or places (e.g. Timbuktu). They share a property with pronouns because their referents must be supplied by context.

[ Placeholder name - Wikipedia, the free encyclopedia ]

I expect that Billy would recommend it, but I recommend setting aside enough time to really explore the janke.