1 definition by ggperly

someone who is really smart, but will not let anyone cheat off of them
Jon: Yo, iv'e been Dan's friend for years, and this morning i asked if i could copy his math homework so i wouldn't get a zero, and he said no.

Peter: yea, Dan can be a real perlmutter sometines.
by ggperly October 23, 2006

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