Green’s Dictionary of Slang

1. breakfast.

1922		Joyce Ulysses 337: And then, when they settled down in a nice snug and cosy little home, every morning they would both have brekky, simple but perfectly served.
1963–74		B. Humphries Barry McKenzie [comic strip] in Complete Barry McKenzie (1988) 68: I don’t feel like brekkie.
1986		T. Winton That Eye, The Sky 70: Why don’t you and me go over after brekky.
1999		K. Sampson Powder 111: [I] had a bit of a kip then went for a sauna an’ a bite of brekkie with Sandy.
2005		P. Howard Curious Incident of the Dog in the Nightdress 15: Brekky for me is basically a jar of, like, jelly beans.
2009		P. Temple Truth 214: Wannt some brkkie? Got eggs from down the road.
2009		J. Joso Soothing Music for Stray Cats 188: I figured I might ‘broach’ the subject over brekkie.
2009		T. Black Gutted 105: Poor buggers — bet they never even get a break for a bit of breckie.
2014		me-stepmums-too-fuckin-hot-mate at www.fakku.net 🌐 Brekkie’s up, you slack cunt.
2015		I. Welsh Decent Ride 134: Nane ay thum ken aboot the square sausage. Git fuckin genned up, ah’d say tae them landladies servin the brekkies at they B&Bs, the square fuckin sausage!

2. (UK prison) breakfast as the last meal before release from prison.

1989

J. Morton Lowspeak 30: Brek – the last meal for a prisoner before his release [...] ‘Only four-three-two and a brek to go.’.