Surprisingly enough, us math majors are human, just like you. Therefore, we would like to be treated like normal college students. So here some things we cringe at hearing.
1. "Wow, you're one of a kind."
Gifted.
2. "Do you, like, enjoy that?"
The person proceeds to toss you an expression of concern, like you purposely sent yourself to Purgatory.
3. "Why?"
4. "You probably don't even need a calculator."
Of course not. I am one.
5. "You can do that in your head, right?"
Yes, I know what the cosine of pi is off the top my head.
6. "I've been horrible at math since the first grade."
7. "Wow, you must be a genius!"
Obviously.
8. "So, you can help me with (insert said math course)?"
You're the math god to all of your friends.
9. "What do you want to do with that?"
10. "Does that make sense to you?"
Most of the time. Sometimes. On a good day.
11. "I don't know how you do it!"