Top Definition
When a (male) person attaches a phallic object (typically a plant or a household item) to his groin area with the goal of simulating an obscenely large penis.
Jim entered the room and saw that his friend Tom was sitting there, playing Call of Duty. Jim too wanted to play but Tom didn't let him. Jim took a nearby elongated cactus and placed it between his legs, pointing at Tom.

Tom screamed: "Put my cactus down, I am so tired of your penile projections!"
by Goban Petrov February 27, 2014
5 Words related to penile projection

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