A "shit head" that over a period of time gets progressively less intelligent to such a degree that the only conceivable explanation for their compounding ignorance is that there are, in fact maggots inside their skull slowly eating away at the fecal matter that their brain is constructed of. In short: Shit head + Maggots= Shmaggot. Alternatively Shmaggot is also the name of the head maggots themselves.
by Jon Klein January 28, 2006
1. The word one uses to replace “faggot” when the teacher is around 2. A combination of shit and faggot.
by Dirty fart November 13, 2017