Stud

Stud could mean:
 Stud (animal) - a male animal employed for breeding 
 By analogy, a virile human male (see gender role)
 A small ornamental button mounted on a short post for insertion through an eyelet
 Screw - a threaded fastener
 The interlocking circular piece of a LEGO brick
 Snowmobile Stud - a metal threaded piece installed in a snowmobile rubber track
 Stud earring for pierced ears
 Cleat - a protrusion on the bottom of a shoe to provide extra grip
 Shoe studs - a traction device used on the bottom of horse shoes
 Traction devices inserted in the tread of automobile winter tires
 Wall stud - a vertical member within a light-frame construction wall
 Stud poker - a kind of card game:
 Five-card stud
 Seven-card stud
 Caribbean Stud Poker
 Studs (game show) - a dating show from the early 1990s
 Stud contact system, an obsolete Ground-level power supply system for tramways