Top Definition
A short post on a messege board usually consisting of one word or one smilie (such as "lol", "heh", ":)"). It comes from a member of Bridge Commander Universe called Nebula who used to post nebisms all the time
by DJcube March 27, 2005
This also includes the text smiley -.-
This is the archetypal nebism and the original, the other above nebisms are those which were the resulting spawn from Nebula's increased nebism activity
The -.- response is a typical response to a post that is veiwed as confusing or irrelevant, since Nebula is incredibley dense and stupid this is an extremly regular occurance
by Glempius March 28, 2005
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