Definition of stags:
(n) :
(countable) An adult male deer, especially a red deer and especially one in high adulthood versus a young adult.
(n) :
(countable, chiefly Scotland) A young horse (colt or filly).
(n) :
(British) A male turkey: a turkeycock.
(n) :
(countable) An improperly or late castrated bull or ram – also called a bull seg (see note under ox).
(n) :
(countable, finance) An outside irregular dealer in stocks, who is not a member of the exchange.
(n) :
(countable, finance) One who applies for the allotment of shares in new projects, with a view to sell immediately at a premium, and not to hold the stock.