Sperm, written backwards in order to bypass chat filters.

The reproductive cells of a male.
Characterized by their round, white bodies and long, white tails used for locomotion.
eww, Cody got his mreps all over my Prom dress.

I'm going to go kill some mreps by drinking Mountain Dew.
by Coldsore Sally August 30, 2009
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A common response that an autistic person gives to questions
John-Paul "Hey did you hear about what happened to Will?"
Tanner (Autistic) "Mrep"
by Shaggytor November 14, 2018
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