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The act of baring one's anus to a party as a sign of defiance.
starer---> one who studies stars

venuser----> one who studies venus

mooner---> one who jumps out of alleys to young women, bent over, showing them his bare derrier sayin "How's this for a black hole?"
by Kung-Fu Jesus April 28, 2004
a radical song from the Broadway show Grease (it wasn't in the movie)
I've spent my days just mooning all over you.
by Gwen Stefani Grrl June 20, 2004