Ninja Tits

When a woman, be it through loose baggy clothing or some other means, does not appear to have a very impressive rack then reveals that she has fantastic tits.

So I really I liked this girl at work, not too cute but a lot of fun. But I only ever saw her in that dumb, baggy work uniform, so when we went to a bar and she worse this tight T-shirt, I was floored. She'd been holding out on the Ninja Tits!