what does "Don't say what you mean you might spoil your face" mean?

Question

just curious...

Answer 1

'Your face' referring to your mask, the character you want everyone to believe is really you.

Saying what you really mean would make you lose face.

Ever heard the expression "losing face"?

Answer 2

I believe it refers to not being an open and honest individual, but rather someone who just mimics others to appear as one of the "in crowd". Like kids in school who don't want to appear too smart because they fear they won't fit in.

The Cure
Jumping Someone Else's Train

Don't say what you mean
You might spoil your face
If you walk in the crowd
You won't leave any trace
It's always the same
You're jumping someone else's train

It won't take you long
To learn the new smile
You'll have to adapt
Or you'll be out of style
It's always the same
You're jumping someone else's train

If you pick up on it quick
You can say you were there
Again and again and again
You're jumping someone else's train

It's the latest wave
That you've been craving for
The old ideal
Was getting such a bore
Now you're back in line
Going not quite quite as far
But in half the time
Everyone's happy
They're finally all the same
'cause everyone's jumping
Everyone else's train

Jumping someone else's train
Jumping someone else's train
Jumping someone else's train