stag

An adult male deer.

A colt, or filly.

(by extension) A romping girl; a tomboy.

An improperly or late castrated bull or ram – also called a bull seg (see note under ox).

An outside irregular dealer in stocks, who is not a member of the exchange.

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.

The Eurasian wren, Troglodytes troglodytes.

(usually attributive) An unmarried male, a bachelor; a male not accompanying a female at a social event.

“a stag dance; a stag party”

A social event for males held in honor of a groom on the eve of his wedding, attended by male friends of the groom, sometimes a fund-raiser.

“The stag will be held in the hotel's ballroom.”

A stag beetle (family Lucanidae).

Guard duty.

To act as a "stag", an irregular dealer in stocks.

To watch; to dog, or keep track of.

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