The pull-out method is a contraceptive measure in which a man pulls his penis out of his partner's vagina before ejaculation in order to avoid impregnating his partner. The aim is for the man to ejaculate outside and away from the vagina. There is evidence that this contraceptive method has been used for thousands of years. However, while it's simple it isn't very effective.
The pull-out method is also known as coitus interruptus.