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