gold rush

Short definition from Wiktionary

Noun

1. 1
   Any period of feverish migration into an area in which gold has been discovered.
2. 2
   A feverish obsession with seeking profits, especially in new markets.
3. 3
   A cocktail made from bourbon, honey, and lemon juice.
4. 4
   The urge to win gold medals, as in the Olympic Games.
5. 5
   Alternative spelling of gold rush.