When you see a flat online and it looks big, bright and modern, then when you get to the viewing only to see it’s tiny, dark and run down. You’ve been flatfished.
When an individual participates in a dating site hookup only to discover that the other individual is substantially larger than you were initially led to believe.
When a “bigger” gal only takes pictures from the neck or chest up to appear skinny but in person she’s totally a bigger gal.
Danny: what’s up with you and that girl you met on tinder bro?
Nick: Oh her? Nah man she fatfished me. Totally got me dude. Nothing like her picture.
Danny: Damn bro that’s crazy! Shit...