This is that little solo/outro Duddy does at the end. Its pretty simple.
[ Tab from: http://www.guitaretab.com/d/dirty-heads/238152.html ]
T |---------------------------------------------------------------------|
|---------------------------------------------------------------------|
A |---------------------------------------------------------------------|
|------\7---5---7---5-------5---7~----9---7---5-------5---7---5~------|
B |-----------------------7-------------------------7-------------------|
|---------------------------------------------------------------------|
/ = slide (doesn't really matter where you slide from... pick the string as you're sliding)
~ = vibrate
He adds a little bit of "flare" to it... but that's the basis of it.
