coitus interruptus

Definition

Or: interrupted coitus , a doubtful contraceptive method consisting in withdrawing the penis from the vagina before ejaculation. Although it is the oldest known form of contraception, withdrawal is unreliable as a birth-control method; it is considered, at best, 75% effective because seminal fluid may be emitted without sensation before ejaculation. In Australia, it is called: getting off at Redfern , in Britain: getting out at Gastshead , the Irish and Irish Americans say: to leave before the gospel.
Etymology: From the Latin coitus , copulation, and interruptus , interrupted.
Synonyms: French method; interrupted coitus; onanism; pulling out; withdrawal method.