She is a predator posing as a house pet

[thedaffodils]

I heard someone said, "She is a predator posing as a house pet" to another man in an American movie.

I got the drift of the words.

Is "a predator posing as a house pet" an idiom?

Thank you~

 

[Raymott]

No, it's just a smart line someone wrote for the movie.

 

[tedmc]

The line is very similar to the idiom 'a wolf in sheep's clothing'.

not a teacher

 

[Matthew Wai]

The idiom might have originated from 'They come to you in sheep's clothing, but inwardly they are ferocious wolves.'── Matthew 7:15

Not a teacher.