Batting Merrins 

An expression meaning 'batting above your average' or 'punching above your weight'.
(Dating or trying to date someone who may be considered a lot more attractive.)

Most likely coined by Matt from the most recent season of My Kitchen Rules.

Matt: "Amy is batting Merrins."
Everyone else at table: *Shocked silence*

Batting Merrins by ~Emmsies~ February 13, 2017

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"

Batting Merrins by JimmyTI May 16, 2023