Aunt Betsy’s cookie store, n. — Green’s Dictionary of Slang

Aunt Betsy’s cookie store n.

[initial letters]

(US campus) Alcoholic Beverage Control store.

1996

Eble Sl. and Sociability 37: In a reverse process, an established acronym or letter name can be expanded. ABC store (from Alcoholic Beverage Control Store) becomes Aunt Betsy’s Cookie Store.