Top definition
A female who posts anonymously to internet message boards, typically associated with the popular 4chan image board /b/.
Anonymiss is a direct opposition to the male dominated group of "anons" who overtake /b/. The main focus of anonymiss is to show that girls are on the internets too and boys should expect them.
Jim: Girls on my interwebz?!?
Jack: Uh oh, it's an anonymiss!
by Therealanonymiss June 03, 2009
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