Let Me Google That For You:
A catfish is someone who pretends to be someone they’re not using Facebook or other social media to create false identities, particularly to pursue deceptive online romances.
Did you hear how Dave got totally catfished last month?! The fox he thought he was talking to turned out to be a pervy guy from San Diego!
I was really falling for that gorgeous gal on Facebook, but she turned out to be a catfish.
Source: Urban Dictionary: catfish
Amazing how many people expect you to chew their food and swallow it for them too.