[FrankSansC]

Neither do I and I'm also french. I've checked on the french wiktionary[1] and in fact that's a real french saying. But I've never heard someone say this in my all life.

[1] https://fr.wiktionary.org/wiki/s%E2%80%99en_badigeonner_les_...

[baby]

I read a lot of Achille Talon and I have no memory of this, I was a kid though... it's really from a different generation.

[obruchez]

You wouldn't find anything vulgar in Achille Talon, anyway.