deceptofile

(n) a person who looks attractive from the side but vastly less attractive to a disappointing degree when they turn to face you. The root is a combination of the words "deceptive" and "profile".

Note: this is different than a "deceptophyle" which is a guy who only has sex with transformers.

From the side, she was a fox, but when she looked at me head on, I realized she was a deceptofile--so disappointing.