What does it mean when someone says "Too good to be true."?

Question

What I mean is like, I hear a lot of people say something that involves "too good to be true."

I want to know what it really means. If it's good or bad, and the meaning. please? :D

Also in the song "Can't Take My Eyes Off Of You", it goes "You're just too good to be true."

I GET CONFUSED! :P Please help me get it into my MIND! :D

Answer 1

It means that this is such a rare good thing that it is very likely to be fictitious.

Answer 2

It Means That They Think That You Like Them Soo Much, That They Think It Is Too Good To Be True!!  

Answer 3

You're not the brightest bulb in the box, are you?

Answer 4

too gud to be true is like when someone does sumthing amazing,it seems like its not true becuz their to good,

uh for example

lets say i did 20930181980948 flips in 2 mins? that would mean its to good to be true becuz thats amazing... xD

Answer 5

Saying that something is "too good to be true" is merely a reaction to a very positive experience that you didn't believe could ever happen.  It doesn't mean the experience is bad.  It means that something fantastic has happened to you, and you are questioning it because you never believed it possible before.