taco

1. A Mexican snack food; a small tortilla (soft or hard shelled), with typically some type of meat, rice, beans, cheese, diced vegetables (usually tomatoes and lettuce, as served in the United States, and cilantro, onion, and avocado, as served in México) and salsa.
2. The vulva.
3. A yellow stain on a shirt armpit caused by sweat or deodorant.

verb

To fold or cause to buckle in half, similar to the way a taco is folded.