To cum in someones belly button after you pulled out.
Girl: "whys there milk in my belly button?"

Boy:" thats not milk, i pulled out before i came and ejactulated in your belly button"

Girl:"so now i gotta clean up this Milk Button? Thanks..."
by ShizOwonder December 31, 2011
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when you are having sex and right before you cum, you pull out and ejaculate in her belly button. then later squeeze it out of her belly button like you are milking a cow
my friend: i had the best sex last night
me: did you do some belly button milking
by rad rebel November 1, 2017
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