Intro and mainriff. (chords are F, Bb, G#, C#)
e------------------------------------------------------------]
h------------------------------------------------------------]
g------------------------3--3-------------------------6--6---]
D--3---3--3--------------3--3---6---6--6--------------6--6---]
A--3---3--3--x--x--x--x--1--1---6---6--6--x--x--x--x--4--4---]
E--1---1--1--x--x--x--x---------4---4--4--x--x--x--x---------]
Nirvana - Smells like teen spirit im lost on the x's... i know they're dead noted but i dont know what a dead note is....
"Haha Duuude, you said crank... and then, you said shaft..." -The Great Philoshipher Zane.
They are called, muted strings. All you have to do is lightly press on the strings without them ringing out.
Example: After the F power chord, slightly take the tension off the power chord and "mute" the strings 4 times and with the next up-stroke, strum the next power chord. And the same follows for the other muted section.
Hope that helped!