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what is a person called who is always nosing on other people's business - like having a neighbor always outside on the balcony or window to check the neighborhood out.

marked as duplicate by Mari-Lou A, Drew, herisson, MetaEd, TrevorD Jun 27 '16 at 23:09

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Busybody is a term you can use:

  • a person who is too interested in the private lives of other people

(M-W)

also: Nosy Parker (n, Informal):

  • a persistently nosy, prying person.

(Dictionary.com)

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