bolillo

From Mexican Spanish bolillo (“bread roll”).

bolillo (plural bolillos)

1. A type of white bread roll from Latin America
   • 2009 August 26, John T. Edge, “In Praise of the All-American Mexican Hot Dog”, in New York Times‎:

     In Tucson more than 100 vendors, known as hotdogueros, peddle Sonoran-style hot dogs — candy cane-wrapped in bacon, griddled until dog and bacon fuse, garnished with a kitchen sink of taco truck condiments and stuffed into split-top rolls that owe a debt to both Mexican bolillo loaves and grocery store hot dog buns.

Diminutive of bolo

bolillo m (plural bolillos)

1. (regional) bread roll
2. (Mexico) type of bread
3. (regional, derogatory) Someone of Caucasian race.
4. bobbin