In french, we have "they are not not the sharpest knives of the drawer" but my favorite one is "he is not the penguin who slides the furthest" :D

On the light related ones, I only know "they are not lights" which is a bit to bare bones to my taste, but works well in french

We have the knife in the drawer one in Swedish too. My favourite one is "The wheel is spinning but the hamster is dead" however.

That feels a lot like 'the lights are on but nobody is home'

> but my favorite one is "he is not the penguin who slides the furthest" :D

Did you too learned that one in the related thread on /r/France last year[1]? Or was it something that you heard IRL?

[1] https://www.reddit.com/r/france/comments/uhazwh/connaissezvo...

I heard it in real life and I Googled it to check the person speaking did not make it up ^^

Never heard the penguin one in any language but it sure is hilarious!

I hope I can remember that one.

One taco short of a combination plate.

"A few fries short of a happy meal"

People there were definitely some half a micrometer short of seeing the light.

5 watts short of a 10 watt bulb (halfwit)