The line comes from Les Bronzés font du ski, the 1979 French comedy sequel about a group of holidaymakers on a ski trip. In the film it is offered as a tongue-in-cheek justification for trying something with almost no chance of success, and the phrase entered everyday French as shorthand for that kind of optimistic gamble. Decades later it circulates online as a short audio clip and meme caption, especially in French-language edits, because the wording is instantly recognisable and fits almost any unlikely attempt.