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.