noun

1. An adult male deer.

2. A colt, or filly.

3. (by extension) A romping girl; a tomboy.

Synonyms: bachelor party, stag do, stag lunch, stag party

verb

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

2. To watch; to dog, or keep track of.

Synonyms: shadow

adverb

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