@bouletcorp2

"Merde à la puissance treize" used to be an expression when I first lived in France in the 1970s, mainly used by students, but is apparently not used these days.

One of my former girlfriends a native English speaker, spoke pretty fluent Parisian slang which she had learned whilst living there in the early 1970s. She was surprised to find that very few people had the first idea what she was talking about when we visited the Nord - Pas de Calais 15 years later!