whatsername

As a pronoun whatshername

is a female person or entity, whose name one does not remember but that is known to the person to which one is speaking.

As a noun whatsername is

a placeholder for the name of a woman whose name the speaker can not bring to mind.

As nouns the difference between taxonomy and whatsername

is that taxonomy is the science or the technique used to make a classification while whatsername is (colloquial) a placeholder for the name of a woman whose name the speaker can not bring to mind.

Whatchamacallit is a related term of whatsername.

As nouns the difference between whatchamacallit and whatsername

is that whatchamacallit is ''a metasyntactic term used for any object whose actual name the speaker doesn’t know or can’t remember while whatsername is (colloquial) a placeholder for the name of a woman whose name the speaker can not bring to mind.

Whatsit is a related term of whatsername.

As nouns the difference between whatsit and whatsername

is that whatsit is (chiefly|uk) a thing (used in a vague way to refer to something whose name one cannot recall, or that one is embarrassed to say ) while whatsername is (colloquial) a placeholder for the name of a woman whose name the speaker can not bring to mind.

As nouns the difference between placeholder and whatsername

is that placeholder is something used or included temporarily or as a substitute for something that is not known or must remain generic; that which holds, denotes or reserves a place for something to come later while whatsername is (colloquial) a placeholder for the name of a woman whose name the speaker can not bring to mind.

Whatsisname is a related term of whatsername.

In colloquial terms the difference between whatsername and whatsisname

is that whatsername is a placeholder for the name of a woman whose name the speaker can not bring to mind while whatsisname is a placeholder for the name of a man whose name the speaker can not bring to mind.