1) Away With the Fairies
Tina drunk too much and is now away with the fairies.
Jessica always acts like she is away with the fairies.
Ryan maybe away with the fairies at times, but he is still my friend,
Meaning:Someone who is away with the fairies is in such a dreamy state that they are not totally in touch with reality and give the impression of being slightly mad.
Etymology: Refers to someone not being completely in touch with reality.
2) Err On the Side of Caution
My friends said I was erring on the side of caution when I decided not to risk investing my money in the share market.
Gary doesn't think he errs on the side of caution. He just thinks he doesn't take unnecessary risks.
Everyone erred on the side of caution when they went mountain climbing.
Meaning: If you err on the side of caution, you are overly careful in your approach to something.
Etymology: to err means to do something wrong, so erring on the side of cautions refers to someone who may not be doing something 100% correct but it is the safest way possible.
3) A Fair-weather Friend
Jack and Thomas are only fair-weather friends, but they do have fun together.
I had lots of friends when I was rich and successful, but when the money was gone it became clear that most were only fair-weather friends.
Would she still want to know you if you were sick or in trouble, or is she just one of those fair-weather friends?
Meaning: A fair-weather friend is a person who will only be your friend when things are going well for you.
Etymology: This buzz lingo refers to friends that are only willing to accompany you through the good times, and will not be there for you during the bad.