Top definition
A fatty in disguise is usually a woman who uses deceptive tactics to conceal her large body mass. She will often wear black to slim her figure or wear large multicolored garments as a distraction to her prey. When online, the FID will often take pictures at awkward angles and these photos will usually only be head shots.

With practice and experience, a man can quickly spot a fatty in disguise and avoid wasting his time and energy.
"Mary's online dating profile looked really good, and she had a lot of nice headshots. I enjoyed talking to her on AIM and the phone. But after doing some stalking on google, I found out that she's really a fatty in disguise, a fat, wretched, beast of a woman."

"That girl has big tits but its just all fat, take a closer look past that floral pattern on her dress, she's a fatty in disguise man! Don't do it! "
by Saynotofatchicks July 22, 2016
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