Listen to the song here. The Foggy Mountain Boys was an American bluegrass band. The band was founded by guitarist Lester Flatt and banjo player Earl Scruggs. The group is considered one of the premier bluegrass groups in the history of the genre.
It probably means nothing. Yellow is the color we expect urine to be. If you take a vitamin supplement, these can sometimes give the urine an almost fluorescent color, a very bright yellow or yellow-green.
If you have noticed dark yellow colored urine persistently for 3-4 days, and if you are not consuming any medicines and foods that can change the urine color, you should immediately see your doctor. Dark yellow urine can be a symptom of jaundice, cirrhosis, other liver diseases, cystitis or urinary tract infection.