Dumb

 Here's the verse riff. 
  
       E5        G5 
 Eb -------------------|-- 
 Bb -------------------|-- 
 Gb -------------------|-- 
 Db -----2--------5----|-- 
 Ab -----2--------5----|-- 
 Eb -0-----0--3-3---0--|-- 
  
 The chorus is just the same chords, except open. 
 nirvana 
 Dumb 
  
 Verse: 
   
      E   G 
 Eb ---0---3--|- 
 Bb ---0---3--|- 
 Gb ---1---0--|- 
 Db ---2---0--|- 
 Ab ---2---2--|- 
 Eb ---0---3--|- 
  
 On the second chorus this bridge appears, the last time strum C once. 
  
       B         C 
 Eb ---2-2-2-2-2\3-3-3-3-3--|- 
 Bb ---4-4-4-4-4\5-5-5-5-5--|- 
 Gb ---4-4-4-4-4\5-5-5-5-5--|- 
 Db ---4-4-4-4-4\5-5-5-5-5--|- 
 Ab ---2-2-2-2-2\3-3-3-3-3--|- 
 Eb ------------------------|- 
  
 That's it.