Green’s Dictionary of Slang

lair n.2

also lare
[backform. f. lairy adj. (2)]

1. a show-off, one who dresses flashily; also attrib.

implied in lair v.
[Aus]Sydney Sportsman (Surry Hills, NSW) 11 Aug. 16/2: Heard one airing his tonsils at the Sports Ground by telling Dave Brown he was a ‘lair’ for side stepping round behind the posts for a try.
[Aus]Baker Popular Dict. Aus. Sl. 42: Lair, a flashily-dressed man.
[Aus]D. Stivens Jimmy Brockett 30: We must have looked a pair of lairs.
[Aus]K. Tennant Joyful Condemned 164: The other, younger man was of the tough lare type, in rather soiled brown trousers and a white silk shirt.
[Aus]‘David Forrest’ Hollow Woodheap 13: ‘Mug lair!’ yelled the gentleman, ‘You might have killed a bloke!’.
[Aus]D. Martin Hero of Too 319: He hated Delaney for the biggest lair out of Queensland.
[Aus]J. Alard He who Shoots Last 73: Turn it up Wrecker, why be a bloody lair.
[Aus]F.J. Hardy Outcasts of Foolgarah (1975) 21: She better watch herself. He’s a lair, Flo, a mug lair at heart.
[Aus]R. Beckett Dinkum Aussie Dict. 34: Lair: A flash bastard who plays up like billy-oh and dresses up like a pox doctor’s clerk.
[Aus]R.G. Barrett White Shoes 64: He was a full-on little lair.
[Aus]J. Byrell Lairs, Urgers & Coat-Tuggers 90: ‘If you hear a bloke referred to as a ‘lair’ that means he’s usually someone with a bit of colour who likes to do a bit of skiting if he’s backed a winner at a bit of odds and therefore thinks he’s a half-pie genius’.
[Aus]G. Seal Lingo 38: Other convict terms that are either still with us or have only relatively recently dropped include: fence, flash, jemmy, kid, lark, leary (leading to lair), mug, out and out.
[Aus](con. 1945–6) P. Doyle Devil’s Jump (2008) 9: A pair of lairs go up and danced on the bonnet of the Chev.

2. behaviour considered to be showing off; also attrib.

W. Grout My Country’s Keeper 139: People thought I did it ‘lairising’- being a show-off – as we say at home. It seemed to them I had caught the ball and spilled it only when throwing it in the air, a favourite flourish of ’keepers but branded a ‘lair act’ by many Aussie spectators.
[Aus]M. Walker How to Kiss a Crocodile 27: Gee, there was a lot of lair in them too! They are very quick to show off what they’re made of.

In derivatives