After some searching on the internet, I found a nice piece of code to do this. Drawback is it asks you to recognize the core file to make sure its not some other file named core. Source : http://csnbbs.com/
Code:
find . -name core\* -user $USER -type f -size +1000000c -exec file {} \; -exec ls -l {} \; -exec printf "\n\ny to remove this core file\n" \; -exec /bin/rm -i {} \;
Please post if you have better solutions.