Green’s Dictionary of Slang

1. (US) Aqueduct race track, New York.

1966

J. Breslin [synd. col.] 23Mar. [headline] Aunt Marge makes the ‘Big A’ Scene [...] Off to Aqueduct they go and Aunt Marge loves it.

2. (US) Amarillo, Texas.

1975		L. Dills CB Slanguage 10: Big A: Amarillo, Texas.
1998		Infoway (Farmington NM) 🌐 Kansas City is K-C City; Amarillo, Texas is the Big A; the Big E is Elizabeth, NJ.
2002		Texas Musicians and Artists 🌐 The Steak House & Lounge had just placed some radio spots about Swafford & his new soul group, when every Amarillo musician in Big A. came a-callin’.

3. (US, also A-Town) Atlanta, Georgia.

1974		Lieberman & Rhodes CB (2nd edn) 123: Big A—Atlanta.
1975		L. Dills CB Slanguage 10: Big A: Atlanta, Georgia.
1995		L. Stavsky et al. A2Z 2: A-Town – Atlanta, Georgia.
2001		JBz House of Web 21 Mar. 🌐 A rainy and cold day in the Big A and another opportunity to spread usless mayhem on the web!
2004		T.I. ‘Be Easy’ 🎵 Uh, uh... A-Town... stay down.
2010		(con. 1947) G. Logan First Eight 49: Atlanta [...] the ‘Big A,’ is a city soon to be tagged ‘a city too busy to hate’.

4. (US) New York [Big Apple n.].

1972		C. Bukowski Erections, Ejaculations etc. 56: There wasn’t a nicer city in the world when you had it made, only one worse when you didn’t [...] the Big A.
1988		Lewin & Lewin Thes. Sl. 255/1: New York City, Big A.

5. (Aus.) Australia.

1987

R. Miller Slob 201: Man, soon’s I can get me another two grand we’re goi’ to fuckin’ Big A, man [...] Fuckin’ Australia, man [HDAS].