This is a metaphor, not an idiom. They are comparing that person to an angel, which is a supremely good being in religious lore.
showing little effort and no real interest.
It is not an idiom, it means your nose is itching.
This is not an idiom. Idioms make little or no sense unless you know the definition. This sentence makes perfect sense, so it is not an idiom. The dead fish smelled so bad that even as high as Heaven, you could smell them.
Never heard of that one, but we say "take forty winks" to mean have a little nap.
idiom means expression like a page in a book
Nothing that I have ever heard. "Under the weather" is an idiom, but there's no anger in the phrase.
sweet little angel
It means to make big deals out of little problems.
It means the little angel.
This is not an idiom. It means just what it seems to mean. It's a proverb. And it's also a sentence already.
An asterisk is not an idiom. It is a punctuation mark. It looks like a little star *
An angel's advocate is an idiom for someone who sees the good points about an idea and supports it on the merits of the good points.
It means 'my [dear] little angel.'
showing little effort and no real interest.
i love you, my little angel
It is not an idiom, it means your nose is itching.
It's not really an idiom. It means "what are you thinking about."