Betting strategies or betting systems are approaches to gambling intended to increase the odds of winning.
Independent Events
The following betting strategies have been recorded as being applied to games which operate on independent events. For such games, the odds of a particular outcome are identical for every bet played. No such strategy can [...]

A bar bet is a bet made between two patrons at a bar. Bar bets can range from wagers about little-known trivia, such as obscure historical facts, to feats of skill and strength. Some bar bets are intended to trick the other party into losing.
Famous bar bets

The annual Midnight Sun baseball game [...]

In gambling, a Bank Job is a term for putting all of your money on a particular betting option, for instance “Yankees to beat the Kansas City Royals is a Bank Job”
It is often mocked by statements claiming people have “Multiple Banks” on a particular bet, for instance “I have 4 Banks [...]

Betting arbitrage, surebets, sports arbitraging is a particular case of arbitrage arising on betting markets due to either bookmakers’ different opinions on event outcomes or plain errors. By placing one bet per each outcome with different betting companies, the bettor can make a profit.
In the bettors’ slang an arbitrage is often referred [...]

Betfair

Type
Betting exchange

Genre
Online gambling

Founded
2000

Founder
Andrew Black and Edward Wray

Headquarters
London, United Kingdom

Website
http://www.betfair.com/

Betfair is the world’s largest Internet betting exchange. The company is based in Hammersmith in West London, England.
Since Betfair was launched in June 2000 it has become the largest online betting company in the UK and the largest bet exchange in the world. [...]