This isn't an idiom because it means just what it seems to mean - you're going to do something even if it kills you. Of course, most people don't really mean that, so it IS an exaggeration or hyperbole.
The idiom to kills/slaughter the fattened calf basically means that you will celebrate with a friend or relative that you have not seen in a very long time.
It means curvaceous, slightly plump even.
That is not a phrase in English, even in a literal sense.
To "call it even" means to agree that there is no winner in a contest, or no debtor in an exchange.
"The idiom 'that just kills' is hardly appropriate at a funeral."
This isn't an idiom. It means just what it seems to mean. Something is enough so that even a saint would lose patience with it.
It's not really an idiom. It means "what are you thinking about."
RFP is not an idiom. It's an abbreviation.
It is not an idiom, it means your nose is itching.
It's not an idiom - it's a description of what happens when you get nervous and excited. Your legs feel wobbly and you might even fall over because your knees get weak and collapse underneath you.
idiom means expression like a page in a book
It's not an idiom. It means the tip of your nostril.