adverb/a n(ə) sa.vwaʁ k‿ɑ̃ fɛʁ/
more than one knows what to do with, more than one can shake a stick at (a great number or amount of)
“Les Mirabeau ont de l'argent à ne savoir qu'en faire” — The Mirabeaus have more money than they know what to do with.