fěi​yí​suǒ​sī

unimaginable

匪夷所思 fěi​yí​suǒ​sī
unimaginable idiom
so strange or unusual that it is difficult for an ordinary person to conceive or understand

The plot of this movie is very bizarre and inconceivable.

Frequency

Movie subtitles
1.37 per million appears in 1% of films
Written text
2.45 per million

Sources

Definitions
CC-CEDICT