Is your face tired? My face is tired.

THIS THREAD IS SUPPOSED TO BE SPOILER-FREE. 


As some of you may already know, one of the female characters uses a strange phrase (which had already become some sort of meme)- ' My face is tired'.
The context is that she's in charge and she had\has many things to do, and (apparently) she's not too happy about her burdens and responsibility.

I know that idioms and set phrases can  sometimes seem confusing, funny or awkward for the non-native speakers, so I just assumed it's one of those.  However, I could not track its origin. It's like it had not even existed before they had used it in MEA. Now, I would really  love to hear what native English-speakers have to say about it. Had anyone heard it before? How common or uncommon is it? Is it (may be) some kind of Canadian thing, a calque from some French expression?
 

 It certainly does not feel 'right'. Could it be a mistake? Could Karin Weekes miss something like that?  Technically it's normal for the fictional settings to have their own 'in-game' idioms , but they are supposed to be recognizable as such. 'The Expanse' had their crazy 'Belters language', but we had never seen anything like that in ME (not to mention that rest of her speech sounds like common English).  I'm not sure what to think of it.