Top Definition
An expert in beer - like a beer "genius" - an Einstein of beer.
Which beer should we take with us on our hike?

Call Crosby, that guy's a real Beerstein, he knows about beer what Einstein knew about the universe, like everything.
by OblateSpheroidWithAnEqBulge June 07, 2015
1 more definition
those sweet mugs that german people drink their awesome beer with
That is a cool looking beerstein you are drinking out of my fellow german beer drinker!

Ja sir!
by beer drinker341 September 24, 2006

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