Top Definition
The weight that you potentially be if you hadn't eaten the cake, hamburgers, soda, and ice cream today. To calculate back you measure how tight your jeans have gotten throughout the day.

This is the weight you should use when telling your friends especially of the opposite sex.

acronym: PBW
My potential body weight is 115 pounds after considering the cheesecake I just inhaled.
by lil.TW February 26, 2010
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