Those lines are sung by country music singer, Charlie Daniels.
Sittin' on a bar stool actin' like a durn fool is the first line of Daniels' country song Drinkin' My Baby Goodbye.
An almost identical lyric is found in another country music singer's song titled Honey, I Do, performed by Danni Leigh.
Leigh's version goes like this: Just sittin' on a barstool actin' like a sad fool.
Find out where to catch Charlie Daniels live by checking his upcoming tour dates on CharlieDaniels.com.
Of interest, take a look at Billboard.com's 30 Greatest Country Artists of the Modern Era.