be away with the fairies

To be a bit crazy. I can't follow what your mom is talking about—it's like she's away with the fairies all of a sudden.

(humorous)

to be slightly mad It's no good asking her to look after the children - she's away with the fairies most of the time.

Name	Pronounced	Usage
Rossi	[rəu'si:]
Nuan	-	Chinese
Ivonette	-	English (Rare)
Jaffe	-	Hebrew
Anar	-	Azerbaijani
Seona	-	Scottish