Top Definition
The gunk that accumulates in the skull over the course of the months and years after one decides to leave the intellectually stimulating environment of a university and take a mind-numbing corporate job.
There is no way that Mark could possibly return to finish his PhD! Brainmold has completely taken hold since he's been living the good life on his XYZ Corp salary.
by smkphilly July 10, 2008

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