Meaning of the word facer in English

What does facer mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

facer

US /ˈfeɪsər/
UK /ˈfeɪsər/

Noun

a difficult or challenging situation or problem

Example:
That exam was a real facer, I wasn't expecting it to be so hard.
The sudden change in plans was a bit of a facer for everyone.