Batting Merrins

Australian slang saying for when someone is dating a person who is a significantly higher catch than themselves.w

The saying is a variation on the term "Batting Overs" which literally means you're batting above your average, but colloquially refers the above dating reference. It originated as a comment on former Rugby League player Trent Merrin during the time he was dating/engaged to professional surfer Sally Fitzgibbons.

Guy 1 "Have you seen his new girlfriend? She's so much better looking than he is"
Guy 2 "Yeah, he's definitely batting Merrins"