Stud

1 a number of horses kept for breeding etc. b place where these are kept. 2 stallion. 3 colloq. young man. esp. one noted for sexual prowess. 4 (in full stud poker) form of poker with betting after the dealing of cards face up. n. 1 largeheaded projecting nail, boss, or knob, esp. for ornament. 2 double button. esp. for use with two buttonholes in a shirtfront. v. (dd) 1 set with or as with studs. 2 (as studded adj.) (foil. by with) thickly set or strewn with. [Old English]