Just had this conversation with my friend on MSN:

Friend: just now I thought my pc was being manipulated by some rotten eggs
Me: [confused] it stinks?
Friend: the mouse didn’t work
Me: how does that relate to rotten eggs
Friend: but the pc operated on its own
Friend: bad guys
Me: [enlightenment] ohhhh
Me: like the chinese
Me: haha i forgot

Basically, in Chinese, we call someone a huai dan (坏蛋) to mean, basically, bastard or crook or scoundrel or asshole or you get my drift, and it means, as my friend said, “rotten eggs.”