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A friend that has smaller boobs than you so that you look better by comparison.

"I'm only an A cup, I hate bra shopping with you." Yea that's why you're my booberfriend!
"I hate bra shopping with you, I'm only an A cup." She said, dismayed. "Yep! That's why you're my booberfriend!"
by Duffgirl1986 April 11, 2015
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