Robbie Williams' "Come Undone"

[trustM]

What does "I come undone" means in Robbie Williams' song:
"So unimpressed but so in awe
Such a saints but such a whore
So self aware so full of shit
So indecisive so adamant
I'm contemplating thinking about thinking
It's overrating just get another drink in
Watch me come undone

They're selling razor blades and mirrors in the street
Pray that when I'm coming down you'll be asleep
If I ever hurt you your revenge will be so sweet
Because I'm scum
And I'm your son
I come undone
I come undone

So rock and roll so corporate suit
So damn ugly, so damn cute
So well trained, so animal
So need your love, so fuck you all
I'm not scared of dying I just don't want to
If I stopped lying I'd just disappoint you
I come undone..."
Don't mind me quoting this much!
Thanx!

[Casiopea]

To "undo" something is to weaken its integrity. To "come undone" is to fall apart psychologically. Something is ruining your prospects, reputation or morals.

[trustM]

THANK YOU SO MUCH! This one has bothered me for long
M

[Casiopea]

You're welcome.