Stud (noun)

1. A small projecting boss, knob, or rivet, typically used to strengthen or decorate a surface.
2. A horse kept for breeding.
3. A group of animals kept for breeding.
4. A man who is considered sexually attractive.

Origin:

Old english stydd, of germanic origin; related to german stütze "prop, support", also to stand.

Examples:

1. The leather jacket had silver studs on the shoulders.
2. She owned a stud farm for breeding horses.
3. The stud of the bull was used for breeding.
4. He was a stud in college, dating many girls.
5. He was considered a stud among his friends.