E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Magneuse (French).
An anonyma or fille de joie; so called from the nunnery founded at Rheims in 1654, by Jeanne Canart, daughter of Nicolas Colbert, seigneur de Magneux. The word is sometimes jocosely perverted into Magni-magno.