When a person has a completely different personality after drinking a few beers. Most times a beerpolar person goes from opposite ends of the personality spectrum. Such as being very shy and quiet to being loud and obnoxious.
Kendra was so friendly last night, it was almost creepy. She is usually a mega bitch. That's because she was drinking last night, the girl is totally beerpolar.
by McGrumpy September 7, 2010
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