Walking on air: to be exuberantly happy, excited, and joyful
The idiom "walk on clouds" means to feel extremely happy or elated, as if one were floating or walking on air. It refers to a state of complete euphoria or bliss.
Knows something about everything
The idiom "walking on air" has its origins in ancient Greek mythology, specifically the story of Icarus and Daedalus. In the myth, Daedalus constructs wings for himself and his son, Icarus, to escape from Crete. However, Icarus flies too close to the sun, causing the wax holding his wings together to melt, and he falls to his death. The phrase "walking on air" alludes to the feeling of lightness and euphoria that one might experience when everything is going well, similar to the sensation of flying.
Someone getting their walking papers is just like getting "the pink slip". It means he or she has received his/her notice of termination (the "walking papers" or "pink slip") and is no longer of the company.The idiom of "getting walking papers" has been extended beyond the workplace and into other social situations: in which case it generally means the recipient is being told to get lost and don't come back. For example, a girlfriend dumping a cheating boyfriend can be said to be "giving him his walking papers".
Picture someone holding their nose up in the air - they look very aloof and snobbish, right? That's what this idiom means.
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 means the tip of your nostril.
idiom means expression like a page in a book
"Sieve" is not an idiom. See the related link.
There isn't an idiom here. Spring is a season, and the song is telling how the season is flowing through the air and people can feel it.