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Meaning of good old boy

good' old" boy'

Pronunciation: (ōl), [key]
— Informal. Informal.
  1. a male who embodies the unsophisticated good fellowship and sometimes boisterous sociability regarded as typical of white males of small towns and rural areas of the South.
  2. a person who belongs to a network of friends and associates with close ties of loyalty and mutual support.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.