I love this!
My husband asked me to purchase some foo-foo from the grocery store shortly after we married 35 years ago. I had no idea what he was asking for. It was his word for canned whipped cream! He’d used it as a child, coined by his grandmother, and now all our, now adult, children say foo-foo.
Of course we also had the prerequisite “besketty” or “skabetty” depending on the child. But foo-foo is definitely the odd-ball word.