Bristling Mexican Eyebrow is that look you give when someone messes with your culture, your food, or your right to enjoy tacos properly. It’s like a raised eyebrow crossed with a fiery ‘I’m-not-backing-down’ attitude, all wrapped in a little Mexican flair. You’d use it when someone dares to say ‘queso’ instead of ‘queso’ or tries to tell you how to make salsa.