stag

Short definition from Wiktionary

Noun

1. 1
   An adult male deer, especially a red deer and especially one in high adulthood versus a young adult.
2. 2
   A young horse (colt or filly).
3. 3
   A male turkey: a turkeycock.
4. 4
   A romping girl; a tomboy.
5. 5
   An improperly or late castrated bull or ram – also called a bull seg (see note under ox).
6. 6
   An outside irregular dealer in stocks, who is not a member of the exchange.
7. 7
   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.
8. 8
   An unmarried man; a bachelor; a man not accompanying a woman at a social event.
9. 9
   A social event for men held in honor of a groom on the eve of his wedding, attended by male friends of the groom; sometimes a fundraiser.
10. 10
    An informer.
11. 11
    Guard duty.
12. 12
    A stag beetle (family Lucanidae).
13. 13
    The Eurasian wren, Troglodytes troglodytes.

Verb

1. 1
   To act as a "stag", an irregular dealer in stocks.
2. 2
   To watch; to dog, or keep track of.

Adverb

1. 1
   Of a man, attending a formal social function without a date.