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when a man is finished having sex with a woman doggystyle. he gently whispers in her ear "I love you". The man waits for the woman to smile, and then furiously punches the shit out of her butt cheeks until they are purple.
Man, I gave Janie a purple moon last night, yes!!!

My boyfriend gave me a purple moon, I can't even take a shit today, it hurts so bad.
by JcMike811 August 05, 2009
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