RX: "Tofu phở would be faux phở. And if you made it with a poodle, it'd be Fifi phở..."
Me: "...and if you used soy poodle substitute, it'd be faux Fifi phở..."
RX: "Add a splash of Bacardi and you'd have faux Fifi phở rum! And if you didn't like it, you'd say 'Fie, faux Fifi phở rum!'"
And, yes, we're mispronouncing it, but it's not funny unless you do.