Top definition
someone who makes stupid mistakes or acts like they have half a brain on occasion, though is generally an intelligent person.

formed from an abbreviation of SPecial EDucation and the word MASTER to clarify just how extreme of a sped that person is.
me: 'i got in the shower last night, and it was really foggy, even though the water wasn't very hot.... it took me like 30 seconds to realize that i was still wearing my glasses. >_>'

friend: 'haha, spedmaster moment of the day!'
by longingforalollipop September 16, 2010
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