when two fat people are sitting one seat apart in the movie theater and their respective fats reach across the empty seat and touch throughout the movie.

similar to footsie.
the guy sitting in the seat beside the seat i was sitting by was fat too and our fat touched. we played fatsie the whole movie.
by viciouskev July 27, 2009
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A name said by a bully who mocks a girl probably named Patsy.
Bully: XD look its fatsy!
Patsy: crying
by mysticalbitch August 18, 2022
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Fatsy is a term when describing someone of upper rank, or superiority in actions. Like, clothes or demeanor. When saying some one is fatsy you are telling them that they are nicely put together in a very superb way.
"Wow, he is so fatsy!" When seeing a delicious man in a tux with very wonderful hair, and air.
"I wish I were as fatsy as her..." When addressing a woman who is obviously much better put together than you.
by T-Shrooms April 14, 2010
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a type of boy that people would love to ride on the back of their harely with.
a fatsy is also known as a klaus
a fatsy may have a cute face, however, not a slim waste
a fatsy tends to be conceited and think their attractive and thin.
by bradley. December 14, 2007
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A codename for a female whom is exceptionally fat, or partaking in activities that lead to fatness, such as over-eating.
"Ugh I ate so much! I'm such a Fatsy McFattington!"

by YoLoRae April 7, 2009
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