Do you just say, I'm a SAHP? I'm not ashamed of it at all but somehow people kind of go "oh" 
I get a bit flustered and just go "Oh I don't, I'm at home with the kids, maybe when they're older". It's a bit of bullshit to get them off my case really as I don't need to go back to work and much prefer being with the children. I've worked in the past as various things and have never found a profession I love or feel comfortable with so I don't have a burning desire to do anything specifically 