How is 渣女 expressed in English? i've known 渣男 as douchebag. how about 渣女? any word to express this in the exact meaning in Chinese? thank you so much.

What does this 上了 mean? I'm reading a Chinese novel called 地底奇人 to practice my reading skill and find out a sentence that I don't really understand. It's like this: "首领, 我们上了那两个中国人的当了!" What does that 上了 mean?