bolillo

noun

bo·​lil·​lo bə-ˈlē-(ˌ)yō 

plural bolillos

: a large, elongated crusty roll of Mexican origin used especially for sandwiches (such as tortas)

Bolillos are crusty, football-shaped Mexican bread rolls that are perfect for tortas or just about any kind of sandwich, or even to dunk into a soup or stew.

—holycowvegan.net

Our preferred torta … piles sliced pork tenderloin on a bolillo …

—Patricia Sharpe and Courtney Bond

Word History

Etymology

borrowed from Mexican Spanish, diminutive of Spanish bolo "bowling pin," derivative from the base of bola "ball," borrowed from Old Occitan, going back to Latin bulla "bubble, knob, stud," of expressive origin

First Known Use

1900, in the meaning defined above