Watch the Smear online guitar lesson by Joe Dalton from 50 Acoustic Blues Licks You MUST Know
This is one of those tricky licks that you should work on slowly and once you get the hang of it, just try it up to speed. Most of time, I think you should gradually increase the speed. This is the exception. I hope that works for you, too. There is no musical term "smear". This lick makes a great fill.