Pickin' And Grinnin' Meaning

(chiefly US, music, idiomatic) Vigorous playing of folk or country music on a stringed musical instrument, especially the guitar or banjo, while smiling broadly.

Example: 1987, Scott Mervis, "Country Slickers," Pittsburgh Post-Gazette, 20 Mar., p. 19 (retrieved 3 Jan. 2009):
  From Kenny Rogers and Ronnie Milsap there was a lot less pickin’ and grinnin’ and a lot more soft rockers and heartbroken love ballads.
2008, Joe Edwards, "Guitar-playing 'ambassador' greets visitors at Nashville's Hall of Fame," USA Today, 25 Jun. (retrieved 3 Jan. 2009):
  In this city of guitars and grits, Andersen is the ambassador of pickin’ and grinnin’.