English In bookmaker betting, the terms "lay" and "back" have a specific meaning. They are often used on betting exchanges such as Betfair.
"Lay" means placing a bet against an event. In this case, you bet that the event will not occur. This differs from traditional betting, where you bet that an event will occur. By choosing a "Lay" bet, you have the opportunity to act as a bookmaker, accepting bets from other players.
You can read more about these types of bets in the article on our website.