That's a dreaded question. I hate when people ask me that. Back when my boyfriend worked for a company that threw holiday parties at Christmas, I'd go with him, and his coworkers and friends would ask me that. I sort-of lied, sort-of told the truth, saying I was a web designer. I did design websites, but just for me, mostly, and not professionally. I've also tried answering "I'm disabled" and some people just change the subject or there's an awkward silence. I don't know what the "right" answer is to give.