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1.
a master in the art of playing piano with the penis.
Sarah is a penisist. Her advice to other inspiring penisists is: "You have to be careful. They have to be hard."
by Nickel For A Smile April 09, 2009
 
2.
the act of discrimination based on the size of a man's penis.
"I don't care if you're the president of the united states, that thing is tiny!"

"Penisist!"
by Hakake May 05, 2010