Stud

Stud: A horse or a number of horses, usually for racing or hunting, bred or kept by one owner.  A studhorse or stallion.

Stud: a knob, nailhead, or other protuberance projecting from a surface or part, especially as an ornament.

 Stud: any of a large number of small projecting lugs embedded in an automobile tire (studded tire) to improve traction on snowy or icy roads.

Stud:  a vertical member made of timber, steel, etc, that is used with others to construct the framework of a wall

Stud: An active, virile, muscular man (slang)

Stud: a variety of poker in which the first card is dealt face down before each player and the next four are dealt face up (five-card stud) or in which the first two cards and the last card are dealt face down and the intervening four cards are dealt face up (seven-card stud), with bets made after each round Often shortened to stud

 Johnny Cash - Tennessee Stud

STUD