E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Pourceaugnac (Monsieur de) (pron. Poor-sone-yak).
A pompous country gentleman who comes to Paris to marry Julie, but the lady has a lover of her own choice, and Monsieur is so mystified and played upon by Julie and her ami du cur that he relinquishes his suit in despair. (Molière: Pourceaugnac.)