False Advertisement is when you pay for something and get something other than what you paid for.
I ordered a toaster from ebay and recieved a microwave. Then I contacted the guy who advertised it and he said "sorry false advertisement".
when you a see a girl from behind or far away and your like "DAAAAAAAAAAAMMMMMMMMMMM she fine" then you see her up close and youur like "DAMMMMMMMMMMMMM" she nasty. Primarily happens when she has a nice body and a butterface (meaning she's good "but her face")
Last week alex saw this hot girl at Macdaddydonalds then she turned around and it was a mom. He was like thats False advertisement.