Also, regular fellow. A nice or agreeable person, as in Luke's a regular guy, or Hilda's a regular fellow. [Colloquial; first half of 1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
Examples from the Web for regular guy
And Christie came across as very credible, he was at his no-b.s., regular-guy best.Remind Me Not to Piss Off Chris Christie
January 2, 2013
His regular-guy persona flattered the élite by making them imagine they were regular guys too.NBC Finally Stops Dithering and Picks Gregory
December 1, 2008