For example...
In my work I asked a teacher about the class he had just taught and his reply was;
'I detected a thin veneer of civility'
I think I have an idea of how that class behaved

another example ....
during a meeting someone said;
'it's on the dark side of cosy'
I tried to perceive an image of 'dark side of cosy' and it still continues to intrigue.

Any other 'turns of phrase' out there that you have encountered?
Our language can be quite delightful at times.
Pete