such-and-such
Some unnamed thing
Such-and-such is a placeholder for something unspecified or hypothetical, used when the actual name or detail doesn't matter: They told me to be at such-and-such address by noon, If you follow such-and-such procedure, you'll get the result.
It stands in for specifics the speaker either doesn't know, doesn't remember, or considers irrelevant to the point being made.
Placeholder for forgotten identity
- whatchamacallitStand-in for forgotten names
- thingamajigPlaceholder for unnamed objects
- blankWithout marks or content
- fill-in-the-blankExercise requiring word insertion
unnamed · variable · stand-in · dummy · proxy · substitute · generic · sample
Not explicitly named
- indefiniteNot precisely determined
- unnamedNot identified or specified
- unknownNot yet discovered
- undeterminedNot yet established
nondescript · indeterminate · certain · particular · some · whatever · whichever · any
what's-his-name
Placeholder for forgotten identity
- whatchamacallitStand-in for forgotten names
- thingamajigPlaceholder for unnamed objects
- blankWithout marks or content
fill-in-the-blank · unnamed · variable · stand-in · dummy · proxy · substitute · generic · sample · example
unspecified
Not explicitly named
- indefiniteNot precisely determined
- unnamedNot identified or specified
- unknownNot yet discovered
undetermined · nondescript · indeterminate · certain · particular · some · whatever · whichever · any · random
- vague wordssomething, someone, somewhere, sometime, somehow
- placeholdersplaceholder, bar, blank, dummy, filler
- thingamajigsthingamajig, thingamabob, whatchamacallit, doohickey, doodad