Can someone explain to me if “tête d’œuf” is a pun here?
I bought this sticker in Brussels and I speak enough French to know it means head of the egg. I asked the sales person if it was a pun or meant something specific, but she struggled to explain and said it means a pseudonym or is something you say to someone you like? I googled and nothing came up besides calling someone an egghead. Am I missing another meaning?