- Here's the chords for the part of "My Big Mouth" which I downloaded
from the Masterplan site. I'm not sure if it's right, but it can give a
little idea to play this - great and very typical  - Oasis song.
From: Anders Bruus, Copenhagen

My Big Mouth by N. Gallagher

Verse 1:
Everybody knows
And no one's saying nothing
Is the sound so very loud
That no one can hear
And there's something in my shoes
That's keeping me from walking
Down along the winding road
Back home to you

Pre-chorus:
When all your songs cease to be (?)
That's what you get for sleeping with the enemy
Where angels fly
You won't play
So guess who's got to take the blame for

Chorus:
My big mouth
And my big name
I put on my shoes while I'm walking
Slowly down the hall of fame
It's my big mouth
You can fly your plane
I put on my shoes while I'm walking
Slowly down the hall of fame

Verse 2: 
I ain't never spoke to god
And I ain't never been to heaven
But you must shoot or leave the way
Even though I'm not worth giving
As you look into the [Am] eyes       [F] [G]
Of a bloody cold as[Am]sassin        [F] [G]
Only then you reali[Am]ze            [F] [G]
This is what you call rede[Am]mption [F] [G]

When [C] all your songs cease to be
That's [G]what you get for sleeping with the enemy
Where [F]angels fly
You won't play
So [E]guess who's got to take the blame for
My big [Am]mouth      [F] [G]
And my big [Am]name   [F] [G]
I put on my [Am]shoes while I'm [G] walking
[F] Slowly down the [G] hall of [Am] fame [F] [G]
It's my big mouth
You can fly your plane
I put on my shoes while I'm walking
Slowly down the hall of fame

Verse:
||Am  F   |G       |Am  F   |G       |
 |Am  F   |G       |Am  F   |G       ||x4

Pre-Chorus:
||C(maj7?)|C       |G       |G       |
 |F       |F       |E       |E       ||

Chorus:
||Am  F   |G       |Am  F   |G       |
 |Am  G   |F  G    |Am  F   |G       ||x2

    Source: geocities.com/hell_iseult/oasis

               ( geocities.com/hell_iseult)