Over the years, I've noticed that many of my hispanic clients tend to speak in Spanish when they get their Brazilians done. Many moons ago, I was fairly fluent in the language, so I usually understand what they are saying. So when a woman looked at me and screamed "Tu Madre" I couldn't help but say something back to her.  I immediately said "Tu Padre"  because it was the only thing I could think of. I'm happy to report it made her laugh.