Green’s Dictionary of Slang

orchestra stalls n.

the testicles.

a.1945		L. Payne private coll.
1960		J. Franklyn Dict. of Rhy. Sl.
1979		R. Barker Fletcher’s Book of Rhy. Sl. 43: I was lucky I didn’t damage me orchestra stalls.
1980		Maledicta IV:2 (Winter) 196: Rhyming slang has many terms for these berries and we hear ‘He hit me in the orchestra’ = orchestra stalls = balls, or coffee = coffee stalls.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 37: Orchestra Falls Balls.
1983		J. Byrell (con. 1959) Up the Cross 10: ‘Awful reached out and gave him a reef up the orchestras’.
1989		J. Morton Lowspeak.
1990		R.G. Barratt ‘Better a White Racist Bastard’ in What Do You Reckon (1997) [ebook] Out here they only cut off my orchestras.
1991		Age (Melbourne) 7 Dec. 130/7: ‘I’ll give you a kick in the orchestra stalls’.
2002		D. Shaw ‘Dead Beard’ at www.asstr.org 🌐 ‘Don’t taken any notice of the little pro,’ Monica says. ‘Harry, you ram it in her right up to your orchestra stalls.’.
2021		Betoota-isms 248: ‘Liam bowled a fast seamer at me and hit me right in the Orchestra Stalls’.