Top Definition
The sexual act of taking human or dog excrement, rubbing it on ones face in the shape of a mustache and "chinstache", and refusing to wash it off for extended periods of time.
That kid jonah was doing the donah last school year until we got tied him down and washed it off of him. Man, that kid LOVES shit on his face.
by shmuelsssclass February 23, 2009

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