Back in 2016 one of my German friends (who since then passed away) used to say an expression in German that seemed common in North Rhine-Westphalia (at least in that familiar circle they all knew it). Due to my lack in german skills, another friend translated back then to me
When a women who is sinking in the mud waves at you (as in asking for help), wave back and let her sink.
Every so often I try to remember it but it's nearly impossible. Also, it's not an option to ask the other person who translated.
What I can recall is that the expression rhymed and here's what I remember from it (which might not even be precise)
Wenn eine Frau im [something that sounded like "mur"] zuwinken, [something I can't recall] und lass sie sinken.
I tried different terms through Google Translate but nothing really sounded like what was told.