SHERRY: And your uniform is darling, really. I love the blue. Of course, I’m sure you look good in anything.
LORELAI: Oh yeah, you should see her in chaps.
Chaps are sturdy coverings for the legs consisting of leggings and a belt, usually made from leather, designed to protect the trousers of a horse rider from scratches against plants and branches. They are particularly associated with cowboys and the American Wild West, and originated in southern Spain, where they were brought to Mexico, and then adopted by American cowboys. They were common in Texas by the 1870s at least.
The Annotated Gilmore Girls 