Top Definition
A portmanteau of "feces" and "thesis."
I spent two years looking for source documents for my goddamn fesis.
All the grant money in the world couldn't improve his fesis.
by Georgia O'Queef November 17, 2011
1 more definition
A brown lump that decends from the anus hole. (Another word for shit)
anus
Soon, the fesis entered the rectum stage where the nutrients raped it until it was brown.
by Adam Fucking Gold June 17, 2008

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