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A person who shows people to their seats in a theatre is called an 'usher'.
RecluseHermitMisanthrope
An usher.
Host or Hostess
A comedian.
A person who shows off their knowledge is often referred to as a "know-it-all" or "smart aleck."
That is a selfish person because they are always self centered.
A person with a cell phone can put that number on the National do Not Call Registry. The do not call registry shows telephone numbers that are not okay to call.
a person who studies people but not an psychologist
Most people call them a homeless person.
A nice person.
you call all those people meaners. this means your just a mean person that likes to laugh at people.