Lori Doesn’t Understand “Doodlesack” [VIDEO]

I'm not the sharpest tool in the shed, this we know, but I give it a go again for the third time by attempting to understand what the word "doodlesack" means.

I'll tell you one thing, I do play a mean air doodlesack.

Still not sure what doodlesack means? Maybe this will help, and please do not make fun of my amazing doodlesack skills.