Ok, I googled the whole cowbell sentence and this is the site I came up with.
Oristar, If this is where you got this particular little ditty...........You must have incredibly interesting reading habits.
http://www.geekspeakweekly.com/cowbell/
Quote:I've got a fever, and the only
prescription is more cowbell!!"
This is a silly, ludicrous statement, a wee bit insane... it's a humourous look at the beauty, that is, the cowbell. Many great songs feature the cowbell's clunk, clunk, clunk as melodic icing and this site contends a mediocre songs will attain nirvana with a a touch of cowbell frosting.
This site was built in mock homage to this often overlooked musical instrument. Enjoy!
To: Go out of the way - Oristar, if I'm going home, driving or walking, and I say I'll bring you home first, and you live in the opposite direction, I'm going out of my normal routine, not taking the shortest path - as the crow flies, I'm doing you a favour, I'm helping you out.
As Clary points out, it can be used to describe a myriad of situations.