Top Definition
A condition where a woman temporarily develops a huge stomach, not from pregnancy or weight gain, but from ingesting copious amounts of beer.
John: "Lizzy sure let herself go, look at her beer belly!"
Mark: "Don't worry thats just her beer pregnancy, she's beer pregnant."

Lizzy: "God I look fat, thank god it's just a beer pregnancy."
by Tom Steven April 11, 2008
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