Once bitten,twice shy!

Once bitten, twice shy: Cops to step up vigil

This headline in the New Indian Express couldn’t go unnoticed.

So what is the meaning of Once bitten, twice shy?

• To be cautious and vigilant the second time because you had an unpleasant experience doing it the first time.

Another interesting headline which was found in Down to Earth using the same expression

Once bitten, twice shy: DNA Profiling Bill revives fear of Aadhaar-like data breach