The phrase "goal cushion" means having a comfortable lead or advantage in a sports game, typically in soccer, where a team has scored more goals than their opponent. It provides a sense of security and reduces the pressure to win. Full definition
Thus we should aim to score as many goals as possible and then be mindful of keeping a two goal cushion between us and they. (justarsenal.com)
The game should've been put to bed at 4 - 2, but we've usually needed a two goal cushion recently, as we've been giving away sloppy goals. (spursfanatic.com)
England now have a two goal cushion in their Euro 2016 qualifier against Slovenia at Wembley, with Danny Welbeck getting his second goal of the game after a wonderful one two with young attacking midfielder Raheem Sterling. (caughtoffside.com)