It originally came from cotton farming, and means to do an entire job by yourself.
No because you can figure out the meaning. "Picking on" is slang, however, for attacking or teasing.
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.
idiom means expression like a page in a book
It's not an idiom. It means the tip of your nostril.
"Sieve" is not an idiom. See the related link.
A drey is a wagon for hauling beer barrels.
Carrying wood, of course.
This is not an idiom. It is a measurement. $100,000 is how you write it in numbers.
Simply its mean a bully.
The idiom your blood is boiling usually means that you are mad/furious.