German phrase
Das ist mir peinlich.
Meaning
I'm embarrassed about that
When to use it
You feel embarrassed. It can gently explain why you do not want others to look.
Example dialogue
Willst du dein Bild der Klasse zeigen?
Do you want to show your picture to the class?
Nein. Das ist mir peinlich.
No. I'm embarrassed about that.