A burro is a small donkey. English took the word from Spanish, and you hear it most in the American Southwest and in writing about Mexico or desert trails — pack animals, canyons, old mining towns. In Britain people almost always just say donkey; burro sounds regional and a bit American. It is a plain noun, not a rude word in English, though in Spanish burro can also tease someone for being slow, the way English sometimes uses donkey. This is the animal, not the food. The food is burrito, which is the Spanish diminutive of this same word.

小驢（西語詞；美西、墨西哥一帶常用）。不是墨西哥捲餅。