noun
a word that functions as the name of a specific person, place, thing, or idea
pronoun
a word that can function by itself as a noun phrase and that refers either to the participants in the discourse or to someone or something mentioned elsewhere in the discourse
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During the meeting, the CEO referred to the new employee as 'what’s-her-face' because he couldn't remember her name.
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I ran into that guy from the party, you know, what’s-his-face, at the grocery store.
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I can't believe that what’s-her-face got the promotion over me, it's so unfair.
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She's always hanging out with what’s-his-face, I think they might be dating.