Early 17th century; earliest use found in Robert Burton (1577–1640), writer. Alteration of masturbation, after the assumed etymology of classical Latin masturbārī from stuprāre to defile.
Definition of mastupration in US English:
mastupration
nounˌmastuːˈpreɪʃn
rare, archaic
Masturbation.
Origin
Early 17th century; earliest use found in Robert Burton (1577–1640), writer. Alteration of masturbation, after the assumed etymology of classical Latin masturbārī from stuprāre to defile.