Description:
In this video it shows me doing an item jump.
Since I don't have the software to edit videos (coming soon), I will loop this video and explain it to you using text.
Beware: This is a glitch, and many look down upon it, so haters ARE going to hate.

1) Use move command to a corner, be it like a slope (in this video), or a 1x1 DIAGONAL gap. (it has to be diagonal, or a different terrain level)
2) Queue an item drop (using shift key modifier) near the centre of where your hero is going to be (slant it a little AWAY from the diagonal gap)
3) Don't move your mouse.
4) Right click item when you see it to try and pick it up.
5) If you do it too fast (like i did in this video, then it will cancel turning (units have turning speed to try and face the item before picking it up) and proceed to your next command, which was a move command then right click on the draenai).
6) ?
7) Profit!
Happy item jumping!
Item jumping works because WW can't pass through items, and he will have nowhere to go but jumping to the other side. Dropping items for item blocking also works to kill titan/builder!
https://www.youtube.com/watch?v=bFyr12B155Y
-Burn