The picture you paint with urine while peeing in public.
Mohammad was wasted, but you gotta respect the murinal of the Mona Pissa he left on the wall outside.
by Silver Cow March 17, 2019
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A mural or painting on a toilet or toilet block. Public toilets are often painted with a picture depicting the area and its history or to brighten them up.
I like that painting on those public toilets, it is a really nice Murinal.
by sirons12 July 31, 2012
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To donate semen at the fertility clinic in exchange for money. Derived from the nickname of a certain college student who financed his beer supply doing just that.

Said donation is commonly referred to as a "Murination"
Man, I'm dead broke again. Time to go down the street and murinate, I guess.

by Demarates August 22, 2006
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