I've Been Floating Down the Old Green River is a 1915 song with words by Bert Kalmar and music by Joe Cooper.
The song is sung from the point of view of a husband who has to explain to his wife why he stayed out until 4:30 in the morning. The tag line in the lyric is:
The song is a play on words, as Green River was a popular brand of whisky at the time.
The popular vocalist Billy Murray recorded the song for Victor Records in 1915.