(pathology) Synonym of defensive wound

Empty boasting reflects poorly on the qualities of the braggart.

(nautical) A person's duty in the navy is first to the ship, then to shipmates, and finally to himself/herself.

Not self-explanatory

Be yourself; be true to yourself; do not engage in self-deception.

(physics) A conjecture asserting that it is impossible to create paradoxes by time travel because the past cannot be changed.

(psychiatry) A proposed personality disorder characterized by a pervasive pattern of self-defeating behavior, beginning by early adulthood and present in a variety of contexts.

plural of self-defeating personality disorder

(euphemistic, humorous) To lose consciousness, especially as a result of alcohol consumption.