Definition of stud:
a man who is virile and sexually active
ornament consisting of a circular rounded protuberance (as on a vault or shield or belt)
an upright in house framing
adult male horse kept for breeding
poker in which each player receives hole cards and the remainder are dealt face up; bets are placed after each card is dealt
scatter or intersperse like dots or studs; "Hills constellated with lights"
provide with or construct with studs; "stud the wall"