(obsolete) Self-deception.
The noun "self-abuse" refers to the physical or verbal maltreatment of oneself, including deliberate self-inflicted injury often associated with mental disorders.
(dated, euphemistic, now frequently ironic or humorous) Masturbation, especially male masturbation, regarded as sinful or harmful.
To harm oneself.
(dated, euphemistic, now frequently ironic or humorous) To masturbate.