Meaning of "good ol' boy"

good old boy

ōl
good old boy also good ol' boy or good ole boy  (ōl)
n. Slang
A man having qualities held to be characteristic of certain Southern white males, such as a relaxed or informal manner, strong loyalty to family and friends, and often an anti-intellectual bias and intolerant point of view.

good ol' boy

good ol' boy
n
a. a man considered as being trustworthy and dependable because of his ordinary and down-to-earth background and upbringing
b. (as modifier): he was expected to bring some good-ol'-boy informality to the White House.