Easy Blues riffs

Ok then here is a little intro thats been very popular with Buddy Guy and all his Buddies. Truth be known he probably stole it from someone. You will recognise it as soon as you play it.
E--------------------------------
B-8h10-vvvv---8h10---8-----------
G-----------------------7--5-----
D------------------------------7-
A--------------------------------
E--------------------------------

E-----------------------------
B-----------------------------
G-----------------------------
D--------5--------------------
A--5--7-----7-----------------
E--------------8--5-----------

By the way, nice to see another Buddy Guy fan out there

Welcome to the madhouse.

Wow. Thanks, that'll take a while to learn. Suppose he just makes it look that easy.

Please excuse this question if it's stupid, but what exactly does the "u" mean in the above tab? As in "5bu"?

???

I assume it's Bend Up.

Actually, I was thinking maybe it's "unbend". If you think about it, what other way is there to bend a string but "up" in pitch? That would make the notation unnecessary.

I've searched several sites regarding "Understanding Tablature" but have not been able to find a hint as to what the "u" means.

Yeah OK you got me on that one! It is actually a "bend up" a whole step.

Thanks so much from yet another Buddy Guy fan.

Now it makes perfect sense.