Some people I trust and feel comfortable with, so I tell the truth - disability. Those I don't, I just talk about my last major job. I don't say "I work at" or "I am working at", but rather "I have worked at" or "My career has been in X". That puts it in the past with ambiguity about the present. From there I can talk about my old job for a long time. If they persist more, I pivot like politicians do. It's also easy to just say "I don't even want to think about my job."