A person or people who take photos of themselves in the lavatories (restrooms) of airplanes.
I just took this picture of myself on a flight from SFO to BOS, I'm a laviator!

I just laviated on that flight! I think we were somewhere over Colorado.
by moshbrown August 31, 2009
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To piss
I drank a gallon of water and now im finna boutta gonna laviate
by BigDiktionary May 1, 2018
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