When exactly are you "too smart for your own good?"

I have heard this expression before, yet
do not quite understand it
When exactly are you too smart for your own good?

is it not the same as saying " you are stupid"?

i hope to read some clever answers, not smart ones.

it means the person who says it is stupid.


/closed

i didnt mean smart ass reply, i ment wise

cutn

cute?

Far as I know, it originally refered to when someone figured something out that got them hurt- IE, if a cop figured out where some criminal was hidding out, and the criminal kills the cop- the cop might be "to smart for his own good" in the eyes of the criminal. when I think of this line in the movies, it is always the bad person from the movie saying it to the good charicter after some evil plan was foiled.