This is my first tab of my own song so im not to sure how accurate it is, but I made it just because I couldn't  find any other tabs for Mushmouth anywhere so I figured I my as well make one.   

*=hold 

Tunning C G C F A D 

Intro
Guitar 1
[---------------------------------------------------------------------]
[---------------------------------------------------------------------]
[---------------------------------------------------------------------]
[-4-5-x-5-4-x-4-5-x-5-4-x-4-5---4-5-x-5-4-x-4-5-x-5-4-x-5-4-----------]
[-2-3-x-3-2-x-2-3-x-3-2-x-2-3---2-3-x-3-2-x-2-3-x-3-2-x-3-2-----------]
[-------------------------*-*---------------------------*-*-----------]

Guitar 2
G[-2--3--2--3-]
C[-2--3--2--3-]
  
Riff 1
[-----------------------------------------------------------]
[-----------------------------------------------------------]
[-----------------------------------------------------------]
[---------4---------5--------4-5---------4---------5-4-4----]
[-0-0-0-0-2-0-0-0-0-3-0-0----2-3-0-0-0-0-2-0-0-0-0-3-2-2----]
[-0-0-0-0---0-0-0-0----0-0---------0-0-0-0---0-0-0-0--------]
  x x x x   x x x x    x x         x x x x   x x x x

Riff 2
[--------------------------------------------------------------------------]
[--------------------------------------------------------------------------]
[--------------------------------------------------------------------------]
[--------------------------------------------------------------------------]
[-2--2-2--5-8-7---2-2-2--6--2-2-2--3-3-------------------------------------]
[-2--2-2--5-8-7---2-2-2--6--2-2-2--3-3-------------------------------------]

Riff 3
[--------------------------------------------------------------------]
[--------------------------------------------------------------------]
[--------------------------------------------------------------------]
[--------------------------------------------------------------------]
[-2-2-2-2-2--2-2-2-2-2-2--8-2-2-2-2-2--2-2-2-8-7-0-5-0-5-4-----------]
[-2-2-2-2-2--2-2-2-2-2-2--8-2-2-2-2-2--2-2-2-8-7-0-5-0-5-4-----------]
                                          *
bridge 1x
[-------------------------------------------------------------------------]
[-------------------------------------------------------------------------]
[-------------------------------------------------------------------------]
[-------------------------------------------------------------------------]
[------0--0--0--0--0--0--0--0--0--0--0--0--0--0--0--0---------------------]
[----- 0--0--0--0--0--0--0--0--0--0--0--0--0--0--0--0---------------------]
       x  x  x  x  x  x  x  x  x  x  x  x  x  x  x  x

Riff 4
[---------------------------------------------------------------------------------]
[---------------------------------------------------------------------------------]
[---------------------------------------------------------------------------------]
[---------------------------------------------------------------------------------]
[---------------------------------------------------------------------------------]
[-0-0-0--9-8-0-7-6-0-5-0-5-4-0-4-3------------------------------------------------]
  x x x

Intro - 2x
Riff 1 - 4x
Riff 2 - 4x
Riff 1 - 4x
Riff 2 - 4x
Riff 3 - 6x
Riff 2 - 4x
Bridge - 1x
Riff 4 - 4x slow  2x fast 2x slow
Riff 1 - 6x