1
general::
New and refreshing, as in His arrival was like a breath of fresh air. This term transfers the idea of fresh air to a new approach or welcome arrival, and has largely replaced both the earlier breath of heaven and breath of spring, although the latter is still heard occasionally. [Mid-1800s]
American Heritage Idioms
2
general::
Phrase(s): a breath of fresh air
1. Lit. an influx of air that is not stale or smelly, especially from outdoors. • You look ill, John. What you need is a breath of fresh air. 2. Fig. a portion of air that is not "contaminated" with unpleasant people or situations. (This is a sarcastic version of Q.) • You people are disgusting. I have to get out of here and get a breath of fresh air. • I believe I’ll go get a breath of fresh air. The intellectual atmosphere in here is stif ling. 3. Fig. a new, fresh, and imaginative approach (to something). (Usually with like.) • Sally, with all her wonderful ideas, is a breath of fresh air. • The decor in this room is like a breath of fresh air.
McGrawhill's American Idioms And Phrasal Verbs