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When it is uncertain if a woman is several months pregnant or is just developing a nice beer gut
Anna: Did you see that lady at the party last night wiht the tube top and an ambigubump?

Robert: Hell yeah, she was gettin' fucked up like a rental car! I thought about saying something but couldn't quite tell if she was preggars or not.
by m.c. phatback April 17, 2010
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