0 a person who attempts to trick someone by phishing (= getting information over the internet and using it to steal money):
1 a person who attempts to trick people into giving information over the internet or by email so that they can take money out of their bank account:
the sentencing of a convicted phisher to 21 months' imprisonment
You are asked to enter your login and password or financial information, enabling the phisher to steal your money.
One problem with using the same password everywhere is that if a phisher gets one, he can log into all your accounts.