1. The male reproductive/sexual organ that is meant to be inserted into the female reproductive/sexual organ during a marriage between the two performing the act called
sexual intercourse, which was created for pleasure and procreation. Pleasure is possible when the nerve in the penis is touched, which sends a very positive and pleasurable signal to the brain. The nerve can be touched in masturbation or
sexual intercourse. Undergoes erection, allowing for
sexual intercourse, when exposed to the promise of sex, (sadly) masturbation, or explicit pictures or happenings. Will excrete sperm when used in sexual intercourse, and will urinate when excessive fluids are consumed or when the liver needs to rid the body of harmful liquids.
Not at all meant to be used to masturbate, but is nonetheless done so anyway.
2. A term used excessively and inappropriately on this website, particularly this definition.